PATIENT 22. NAME DATE YALE-BROWN OBSESSIVE COMPULSIVE SCALE (Y-BOCS)*

Transcription

1 PATIENT 22. NAME DATE YALE-BROWN OBSESSIVE COMPULSIVE SCALE (Y-BOCS)* Questions 1 to 5 are about your obsessive thoughts Obsessions are unwanted ideas, images or impulses that intrude on thinking against your wishes and efforts to resist them. They usually involve themes of harm, risk and danger. Common obsessions are excessive fears of contamination; recurring doubts about danger, extreme concern with order, symmetry, or exactness; fear of losing important things. Please answer each question by circling the appropriate number. 1. TIME OCCUPIED BY OBSESSIVE THOUGHTS SCORE How much of your time is occupied by obsessive thoughts? 0 = None 1 = Less than 1 hr/day or occasional occurrence 2 = 1 to 3 hrs/day or frequent 3 = Greater than 3 and up to 8 hrs/day or very frequent occurrence 4 = Greater than 8 hrs/day or nearly constant occurrence 2. INTERFERENCE DUE TO OBSESSIVE THOUGHTS SCORE How much do your obsessive thoughts interfere with your work, school, social, or other important role functioning? Is there anything that you don t do because of them? 0 = None 1 = Slight interference with social or other activities, but overall performance not impaired 2 = Definite interference with social or occupational performance, but still manageable 3 = Causes substantial impairment in social or occupational performance 4 = Incapacitating 3. DISTRESS ASSOCIATED WITH OBSESSIVE THOUGHTS SCORE How much distress do your obsessive thoughts cause you? 0 = None 1 = Not too disturbing 2 = Disturbing, but still manageable 3 = Very disturbing 4 = Near constant and disabling distress 4. RESISTANCE AGAINST OBSESSIONS SCORE How much of an effort do you make to resist the obsessive thoughts? How often do you try to disregard or turn your attention away from these thoughts as they enter your mind? 0 = Try to resist all the time 1 = Try to resist most of the time 2 = Make some effort to resist 3 = Yield to all obsessions without attempting to control them, but with some reluctance 4 = Completely and willingly yield to all obsessions

2 5. DEGREE OF CONTROL OVER OBSESSIVE THOUGHTS SCORE How much control do you have over your obsessive thoughts? How successful are you in stopping or diverting your obsessive thinking? Can you dismiss them? 0 = Complete control 1 = Usually able to stop or divert obsessions with some effort and concentration 2 = Sometimes able to stop or divert obsessions 3 = Rarely successful in stopping or dismissing obsessions, can only divert attention with difficulty 4 = Obsessions are completely involuntary, rarely able to even momentarily alter obsessive thinking. The next several questions are about your compulsive behaviors. Compulsions are urges that people have to do something to lessen feelings of anxiety or other discomfort. Often they do repetitive, purposeful, intentional behaviors called rituals. The behavior itself may seem appropriate but it becomes a ritual when done to excess. Washing, checking, repeating, straightening, hoarding and many other behaviors can be rituals. Some rituals are mental. For example, thinking or saying things over and over under your breath. 6. TIME SPENT PERFORMING COMPULSIVE BEHAVIORS SCORE How much time do you spend performing compulsive behaviors? How much longer than most people does it take to complete routine activities because of your rituals? How frequently do you do rituals? 0 = None 1 = Less than 1 hr/day or occasional performance of compulsive behaviors 2 = From 1 to 3 hrs/day, or frequent performance of compulsive behaviors 3 = More than 3 and up to 8 hrs/day, or very frequent performance of compulsive behaviors 4 = More than 8 hrs/day, or near constant performance of compulsive behaviors (too numerous to count) 7. INTERFERENCE DUE TO COMPULSIVE BEHAVIORS SCORE How much do your compulsive behaviors interfere with your work, school, social, or other important role functioning? Is there anything that you don t do because of the compulsions? 0 = None 1 = Slight interference with social or other activities, but overall performance not impaired 2 = Definite interference with social or occupational performance, but still manageable 3 = Causes substantial impairment in social or occupational performance 4 = Incapacitating 23.

3 DISTRESS ASSOCIATED WITH COMPULSIVE BEHAVIOR SCORE How would you feel if prevented from performing your compulsion(s)? How anxious would you become? 0 = None 1 = Only slightly anxious if compulsions prevented 2 = Anxiety would mount but remain manageable if compulsions prevented 3 = Prominent and very disturbing increase in anxiety if compulsions interrupted 4 = Incapacitating anxiety from any intervention aimed at modifying activity 9. RESISTANCE AGAINST COMPULSIONS SCORE How much of an effort do you make to resist the compulsions? 0 = Always try to resist 1 = Try to resist most of the time 2 = Make some effort to resist 3 = Yield to almost all compulsions without attempting to control them, but with some reluctance 4 = Completely and willingly yield to all compulsions 10. DEGREE OF CONTROL OVER COMPULSIVE BEHAVIOR SCORE How strong is the drive to perform the compulsive behavior? How much control do you have over the compulsions? 0 = Complete control 1 = Pressure to perform the behavior but usually able to exercise voluntary control over it 2 = Strong pressure to perform behavior, can control it only with difficulty 3 = Very strong drive to perform behavior, must be carried to completion, can only delay with difficulty 4 = Drive to perform behavior experienced as completely involuntary and overpowering, rarely able to even momentarily delay activity. TOTAL SCORE

4 Y-BOCS Symptom Checklist Instructions: Generate a Target Symptoms List from the attached Y-BOCS Symptom Checklist by asking the patient about specific obsessions and compulsions. Chock all that apply. Distinguish between current and past symptoms. Mark principal symptoms with a "p". These will form the basis of the Target Symptoms List. Items marked may * or may not be an OCD phenomena. Current Past AGGRESSIVE OBSESSIONS Fear might harm self Fear might harm others Violent or horrific images Fear of blurting out obscenities or insults Fear of doing something else embarrassing* Fear will act on unwanted impulses (e.g., to stab friend) Fear will steal things Fear will harm others because not careful enough (e.g. hit/run motor vehicle accident) Fear will be responsible for something else terrible happening (e.g., fire, burglary Other: CONTAMINATION OBSESSIONS Concerns or disgust w\ with bodily waste or secretions (e.g., urine, feces, saliva Concern with dirt or germs Excessive concern with environmental contaminants (e.g. asbestos, radiation toxic waste) Excessive concern with household items (e.g., cleansers solvents) Excessive concern with animals (e.g., insects) Bothered by sticky substances or residues Concerned will get ill because of contaminant Concerned will get others ill by spreading contaminant (Aggressive) No concern with consequences of contamination other than how it might feel Other: SEXUAL OBSESSIONS Forbidden or perverse sexual thoughts. images. or impulses Content involves children or incest Content involves homosexuality* Sexual behavior towards others (Aggressive)* Other: HOARDING/SAVING OBSESSIONS (distinguish from hobbies and concern with objects of monetary or sentimental value) RELIGIOUS OBSESSIONS (Scrupulosity) Concerned with sacrilege and blasphemy Excess concern with right/wrong, morality Other: OBSESSION WITH NEED FOR SYMMETRY OR EXACTNESS Accompanied by magical thinking (e.g., concerned that another will have accident dent unless less things are in the right place) Not accompanied by magical thinking MISCELLANEOUS OBSESSIONS Need to know or remember Fear of saying certain things Fear of not saying just the right thing Fear of losing things Intrusive (nonviolent) images Intrusive nonsense sounds, words, or music Bothered by certain sounds/noises* Lucky/unlucky numbers Colors with special significance 3 superstitious fears Other: Current Past SOMATIC OBSESSIONS Concern with illness or disease* Excessive concern with body part or aspect of Appearance (eg., dysmorphophobia)* Other CLEANING/WASHING COMPULSIONS Excessive or ritualized handwashing Excessive or ritualized showering, bathing, toothbrushing grooming, or toilet routine Involves cleaning of household items or other inanimate objects Other measures to prevent or remove contact with contaminants Other CHECKING COMPULSIONS Checking locks, stove, appliances etc. Checking that did rot/will not harm others Checking that did not/will not harm self Checking that nothing terrible did/will happen Checking that did not make mistake Checking tied to somatic obsessions Other: REPEATING RITUALS Rereading or rewriting Need to repeat routine activities jog, in/out door, up/down from chair) Other COUNTING COMPULSIONS ORDERING/ARRANGING COMPULSIONS HOARDING/COLLECTING COMPULSIONS (distinguish from hobbies and concern with objects of monetary or sentimental value (e.g., carefully reads junk mail, piles up old newspapers, sorts through garbage, collects useless objects.) MISCELLANEOUS COMPULSIONS Mental rituals (other than checking/counting) Excessive listmaking Need to tell, ask, or confess Need to touch, tap, or rub* Rituals involving blinking or staring* Measures (not checking) to prevent: harm to self - harm to others terrible consequences Ritualized eating behaviors* Superstitious behaviors Trichotillomania * Other self-damaging or self-mutilating behaviors* Other Adapted from Goodman, W.K., Price, L.H., Rasmussen, S.A. et al.: The Yale-Brown Obsessive Compulsive Scale. Arch Gen Psychiatry 46: ,1989

5 First Edition 10/1/86 (Revised 2/9/11) CHILDREN S YALE-BROWN OBSESSIVE COMPULSIVE SCALE (CY-BOCS) DEVELOPED BY: WAYNE K. GOODMAN, M.D. 1 STEVEN A. RASMUSSEN, M.D. 2 LAWRENCE H. PRICE, M.D. 2 ERIC STORCH, Ph.D 3 DEPARTMENT OF PSYCHIATRY 1 MOUNT SINAI SCHOOL OF MEDICINE DEPARTMENT OF PSYCHIATRY 2 BROWN UNIVERSITY SCHOOL OF MEDICINE and DEPARTMENT OF PSYCHIATRY 3 UNIVERSITY OF SOUTH FLORIDA Investigators interested in using this rating scale should contact Dr. Goodman at the Mount Sinai School of Medicine, Department of Psychiatry, One Gustave L. Levy Place, Box 1230, New York, NY Goodman/Rasmussem/Price/Storch

6 GENERAL INSTRUCTIONS 2 OVERVIEW: This scale is designed to rate the severity of obsessive and compulsive symptoms in children, ages 6 to 17 years. In general, the ratings depend on the child's and parent's report, however, the final rating is based on the clinical judgement of the interviewer. Rate the characteristics of each item during the prior week up until and including the time of the interview. Scores should reflect the average (mean) occurrence of each item for the entire week, unless specified otherwise. INFORMANTS: Ideally, information should be obtained by interviewing: l) the parent(s) or guardian alone, 2) the child alone and, 3) the child and parent(s) together (to clarify differences). The preferred order for the interviews may vary depending on the age and developmental level of the child or adolescent. Information from each of these interviews should then be combined to inform the scoring of each item. Consistent reporting can be ensured by having the same informant(s) present for each rating session. DEFINITIONS: Before proceeding with the questions, define "obsessions" and "compulsions" for the child and primary caretaker as follows: "OBSESSIONS: are thoughts, ideas, or pictures that keep coming into your mind even though you do not want them to. They may be unpleasant, silly or embarrassing". "AN EXAMPLE OF AN OBSESSION IS: The repeated thought that germs or dirt are harming you or other people, or that something unpleasant may happen to you or someone special to you." These are thoughts that keep coming back, over and over again. "COMPULSIONS: are things that you feel you have to do although you may know that they do not make sense..sometimes, you may try to stop from doing them but this might not be possible. you might feel worried or angry or frustrated until you have finished what you have to do". "AN EXAMPLE OF A COMPULSION IS: The need to wash your hands over and over again even though they are not really dirty, or the need to count up to a certain number while you do certain things". "Do you have any questions about what these words called compulsions and obsessions mean?"

7 SYMPTOM SPECIFICITY: 3 The rater must determine that reported behaviors are true obsessions or compulsions and not other symptoms, such as phobias or anxious worries. The differential diagnosis between certain complex motor tics and certain compulsions (e.g. touching or tapping) may be difficult or impossible. In such cases, it is particularly important to provide explicit descriptions of the target symptoms and to be consistent in including or excluding these symptoms in subsequent ratings. Separate assessment of tic severity with a tic rating instrument may be necessary in such cases. Some of the items listed on the CY-BOCS Symptom Checklist, such as trichotillomania, are currently classified in DSM-III-R as symptoms of an Impulse Control Disorder. Items marked "*" in the Symptom Checklist may or may not be obsessions or compulsions. PROCEDURE: This scale is designed to be used by a clinician in a semi-structured interview format. After reviewing with the child and parent(s) the definitions of obsessions and compulsions, inquire about specific compulsions and complete the CY-BOCS Compulsions Checklist on pages 9 and 10. Then complete the Target Symptom List for Compulsions on page 10. Next, inquire about and note questions 6 through 10 on pages 11 through 13, repeat the above procedure for obsessions: review definitions, complete the Obsessions Checklist on pages 4 and 5, complete the Target Symptom List for obsessions on page 5, and inquire about and rate questions l through 5 on pages 6 through 8. Finally, inquire about and rate questions 11 through 19 on pages 14 through 18. Scoring can be recorded on the scoring sheet on page 19. All ratings should be in whole integers. SCORING: All 19 items are rated, but only items 1-10 are used to determine the total score. The total CY- BOCS score is the sum of items l-10, whereas the obsession and compulsion subtotals are the sums of items 1-5 and 6-10, respectively. 1B and 6B are not being used in the scoring. Items 17 (global severity) and 18 (global improvement) are adapted from the Clinical Global Impression Scale (Guy, W., 1976) to provide measures of overall functional impairment associated with the presence of obsessive-compulsive symptoms.

8 Name CY-BOCS OBSESSIONS CHECKLIST Date 4 Check all that apply, but clearly mark the principal symptoms with a "P". (Items marked "*" may or may not be OCD phenomena.) Current Past CONTAMINATION OBSESSIONS Concern with dirt, germs, certain illnesses, (e.g., AIDS) Concern or disgust with bodily waste or secretions (e.g., urine, feces, saliva) Excessive concern with environmental contaminants (e.g., asbestos, radiation, toxic waste) Excessive concern with household items (e.g., cleaners, solvents) Excessive concern about animals/insects Excessively bothered by sticky substances or residues Concerned will get ill because of contaminant Concerned will get others ill by spreading contaminant (aggressive) No concern with consequences of contamination other than how it might feel * Other (Describe) AGGRESSIVE OBSESSIONS Fear might harm self Fear might harm others Fear harm will come to self Fear harm will come to others because something child did or did not do Violent or horrific images Fear of blurting out obscenities or insults Fear of doing something else embarrassing * Fear will act on unwanted impulses (e.g., to stab a family member) Fear will steal things Fear will be responsible for something else terrible happening (e.g., fire, burglary, flood) Other (Describe) SEXUAL OBSESSIONS [Are you having any sexual thoughts? If yes, are they routine or are they repetitive thoughts that you would rather not have or find disturbing? If yes, are they:] Forbidden or perverse sexual thoughts, images, impulses Content involves homosexuality * Sexual behavior toward others (Aggressive) * Other (Describe) HOARDING/SAVING OBSESSIONS

9 Fear of losing things 5

10 Current Past MAGICAL THOUGHTS/SUPERSTITIOUS OBSESSIONS Lucky/unlucky numbers Other (Describe) 6 SOMATIC OBSESSIONS Excessive concern with illness or disease * Excessive concern with body part or aspect of appearance (e.g., dysmorphophobia) * RELIGIOUS OBSESSIONS Excessive concern or fear of offending religious objects (God) Excess concern with right/wrong, morality Other (Describe) MISCELLANEOUS OBSESSIONS Need to know or remember Fear of saying certain things Fear of not saying just the right thing Intrusive (non-violent) images Intrusive sounds, words, music, or numbers Other (Describe)

11 7 TARGET SYMPTOM LIST FOR OBSESSIONS OBSESSIONS (Describe, listing by order of severity): AVOIDANCE (Describe any avoidance behavior associated with obsessions; e.g., child AVOIDS putting clothes away to prevent thoughts.)

12 QUESTIONS ON OBSESSIONS (ITEMS 1-5) "I AM NOW GOING TO ASK YOU QUESTIONS ABOUT THE THOUGHTS YOU CANNOT STOP THINKING ABOUT." 8 1. TIME OCCUPIED BY OBSESSIVE THOUGHTS How much time do you spend thinking about these things? (When obsessions occur as brief, intermittent intrusions, it may be impossible to assess time occupied by them in terms of total hours. In such cases, estimate time by determining how frequently they occur. Consider both the number of times the intrusions occur and how many hours of the day are affected). How frequently do these thoughts occur? [Be sure to exclude ruminations and preoccupations which, unlike obsessions, are ego-syntonic and rational (but exaggerated).] 0 - NONE 1 - MILD less than 1 hr/day or occasional intrusion 2 - MODERATE 1 to 3 hrs/day or frequent intrusion 3 - SEVERE greater than 3 and up to 8 hrs/day or very frequent intrusion 4 - EXTREME greater than 8 hrs/day or near constant intrusion 1B. OBSESSION-FREE INTERVAL (not included in total score) On the average, what is the longest amount of time each day that you are not bothered by the obsessive thoughts? 0 - NONE 1 - MILD long symptom free intervals or more than 8 consecutive hrs/day symptom-free 2 - MODERATE moderately long symptom-free intervals or more than 3 and up to 8 consecutive hrs/day symptom-free 3 - SEVERE brief symptom-free intervals or from 1 to 3 consecutive hrs/day symptom-free 4 - EXTREME less than 1 consecutive hr/day symptom free

13 2. INTERFERENCE DUE TO OBSESSIVE THOUGHTS 9 How much do these thoughts get in the way of school or doing things with friends? Is there anything that you don't do because of them? (If currently not in school determine how much performance would be affected if patient were in school.) 0 - NONE 1 - MILD slight interference with social or school activities, but overall performance not impaired 2 - MODERATE definite interference with social or school performance, but still manageable 3 - SEVERE causes substantial impairment in social or school performance 4 - EXTREME incapacitating 3. DISTRESS ASSOCIATED WITH OBSESSIVE THOUGHTS How much do these thoughts bother or upset you? (Only rate anxiety/frustration that seems triggered by obsessions, not generalized anxiety or anxiety associated with other symptoms.) 0 - NONE 1 - MILD infrequent, and not too disturbing 2 - MODERATE frequent, and disturbing, but still manageable 3 - SEVERE very frequent, and very disturbing 4 - EXTREME near constant, and disabling distress/frustration

14 4. RESISTANCE AGAINST OBSESSIONS 10 How hard do you try to stop the thoughts or ignore them? (Only rate effort made to resist, not success or failure in actually controlling the obsessions. How much patient resists the obsessions may or may not correlate with their ability to control them. Note that this item does not directly measure the severity of the intrusive thoughts; rather it rates a manifestation of health, i.e., the effort the patient makes to counteract the obsessions. Thus, the more the patient tries to resist, the less impaired is this aspect of his/her functioning. If the obsessions are minimal, the patient may not feel the need to resist them. In such cases, a rating of "0" should be given.) 0 - NONE makes an effort to always resist or symptoms so minimal doesn't need to actively resist. l - MILD tries to resist most of the time 2 - MODERATE makes some effort to resist 3 - SEVERE yields to all obsessions without attempting to control them, but does so with some reluctance 4 - EXTREME completely and willingly yields to all obsessions 5. DEGREE OF CONTROL OVER OBSESSIVE THOUGHTS When you try to fight the thoughts, can you beat them? How much control do you have over the thoughts? (In contrast to the preceding item on resistance, the ability of the patient to control his/her obsessions is more closely related to the severity of the intrusive thoughts.) 0 - COMPLETE CONTROL l - MUCH CONTROL usually able to stop or divert obsessions with some effort and concentration 2 - MODERATE CONTROL sometimes able to stop or divert obsessions 3 - LITTLE CONTROL rarely successful in stopping obsessions, can only divert attention with difficulty 4 - NO CONTROL experienced as completely involuntary, rarely able to even momentarily divert thinking

15 Name Date CY-BOCS COMPULSIONS CHECKLIST 11 Check all that apply, but clearly mark the principal symptoms with a "P". (Items marked "*" may or may not be compulsions.) Current Past WASHING/CLEANING COMPULSIONS Excessive or ritualized handwashing Excessive or ritualized showering, bathing, toothbrushing, grooming, or toilet routine Excessive cleaning of items (e.g, personal clothes or important items Other measures to prevent or remove contact with contaminants Other (Describe) CHECKING COMPULSIONS Checking locks, toys, school books/items, etc. Checking associated with getting washed, dressed, or undressed Checking that did not/will not harm others Checking that did not/will not harm self Checking that nothing terrible did/will happen Checking that did not make mistake Checking tied to somatic obsessions Other (Describe) REPEATING COMPULSIONS Rereading, erasing, or rewriting Need to repeat routine activities (e.g., in/out door, up/down from chair) Other (Describe) COUNTING COMPULSIONS Objects, certain numbers, words, etc. Describe: ORDERING/ARRANGING COMPULSIONS Need for symmetry or evening up (e.g., lining items up a certain way or arranging personal items in specific patterns) Describe: HOARDING/SAVING COMPULSIONS [distinguish from hobbies and concern with objects of monetary or sentimental value] Difficulty throwing things away, saving bits of paper, string, etc. Other (Describe)

16 Current Past EXCESSIVE MAGICAL GAMES/SUPERSTITIOUS BEHAVIORS [distinguish from age appropriate magical games] (e.g., array of behavior, such as stepping over certain spots on a floor, touching an object/self certain number of times as a routine game to avoid something bad from happening.) Describe: 12 RITUALS INVOLVING OTHER PERSONS The need to involve another person (usually a parent) in ritual (e.g., asking a parent to repeatedly answer the same questions, making parent perform certain meal time rituals involving specific utensils. * Describe: MISCELLANEOUS COMPULSIONS Mental rituals (other than counting) Need to tell, ask, confess Measures (not checking) to prevent: harm to self ; harm to others ; terrible consequences Ritualized eating behaviors * Excessive list making * Need to touch, tap, rub Need to do things (e.g., touch or arrange) until it feels just right * Rituals involving blinking or staring * Trichotillomania (hair pulling) * Other self-damaging or self-mutilating behavior * Other (Describe)

17 TARGET SYMPTOM LIST FOR COMPULSIONS 13 COMPULSIONS (Describe, listing by order of severity): AVOIDANCE (Describe any avoidance behavior associated with compulsions; e.g., child AVOIDS putting clothes away to prevent start of counting behavior.)

18 QUESTIONS ON COMPULSIONS (ITEMS 6-10) "I AM NOW GOING TO ASK YOU QUESTIONS ABOUT THE HABITS YOU CAN'T STOP." TIME SPENT PERFORMING COMPULSIVE BEHAVIORS How much time do you spend doing these things? How much longer than most people does it take to complete your usual daily activities because of the habits? (When compulsions occur as brief, intermittent behaviors, it may be impossible to assess time spent performing them in terms of total hours. In such cases, estimate time by determining how frequently they are performed. Consider both the number of times compulsions are performed and how many hours of the day are affected.) How often do you do these habits? [In most cases compulsions are observable behaviors (e.g., handwashing), but there are instances in which compulsions are not observable (e.g., silent checking).] 0 - NONE 1 - MILD spends less than 1 hr/day performing compulsions or occasional performance of compulsive behaviors 2 - MODERATE spends from 1 to 3 hrs/day performing compulsions or frequent performance of compulsive behaviors 3 - SEVERE spends more than 3 and up to 8 hrs/day performing compulsions or very frequent performance of compulsive behaviors 4 - EXTREME spends more than 8 hrs/day performing compulsions or near constant performance of compulsive behaviors 6B. COMPULSION-FREE INTERVAL How long can you go without performing compulsive behavior? [If necessary ask: What is the longest block of time in which (your habits) compulsions are absent?] 0 - NO SYMPTOMS 1 - MILD long symptom-free interval or more than 8 consecutive hrs/day symptom-free 2 - MODERATE moderately long symptom-free interval or more than 3 and up to 8 consecutive hrs/day symptom-free 3 - SEVERE short symptom-free interval or from 1 to 3 consecutive hrs/day symptom-free

19 4 - EXTREME less than 1 consecutive hr/day symptom-free 15

20 7. INTERFERENCE DUE TO COMPULSIVE BEHAVIORS 16 How much do these habits get in the way of school or doing things with friends? Is there anything you don't do because of them? (If currently not in school, determine how much performance would be affected if patient were in school.) 0 - NONE 1 - MILD slight interference with social or school activities, but overall performance not impaired 2 - MODERATE definite interference with social or school performance, but still manageable 3 - SEVERE causes substantial impairment in social or school performance 4 - EXTREME incapacitating 8. DISTRESS ASSOCIATED WITH COMPULSIVE BEHAVIOR How would you feel if prevented from carrying out your habits? How upset would you become? (Rate degree of distress/frustration patient would experience if performance of the compulsion were suddenly interrupted without reassurance offered. In most, but not all cases, performing compulsions reduces anxiety/frustration.) How upset do you get while carrying out your habits until you are satisfied? 0 - NONE l - MILD only slightly anxious/frustrated if compulsions prevented; only slight anxiety/frustration during performance of compulsions. 2 - MODERATE reports that anxiety/frustration would mount but remain manageable if compulsions prevented; anxiety/frustration increases but remains manageable during performance of compulsions. 3 - SEVERE prominent and very disturbing increase in anxiety/ frustration if compulsions interrupted; prominent and very disturbing increase in anxiety/frustration during performance of compulsions. 4 - EXTREME incapacitating anxiety/frustration from any intervention aimed at modifying activity; incapacitating anxiety/ frustration develops during performance of compulsions.

21 9. RESISTANCE AGAINST COMPULSIONS 17 How much do you try to fight the habits? (Only rate effort made to resist, not success or failure in actually controlling the compulsions. How much the patient resists the compulsions may or may not correlate with his/her ability to control them. Note that this item does not directly measure the severity of the compulsions, rather it rates a manifestation of health, i.e., the effort the patient makes to counteract the compulsions. Thus, the more the patient tries to resist, the less impaired is this aspect of his/her functioning. If the compulsions are minimal, the patient may not feel the need to resist them. In such cases, a rating of "0" should be given.) 0 - NONE makes an effort to always resist or symptoms so minimal doesn't need to actively resist l - MILD tries to resist most of the time. 2 - MODERATE makes some effort to resist 3 - SEVERE yields to almost all compulsions without attempting to control them, but does so with some reluctance 4 - EXTREME completely and willingly yields to all compulsions 10. DEGREE OF CONTROL OVER COMPULSIVE BEHAVIOR How strong is the feeling that you have to carry out the habit(s)? When you try to fight them what happens? (For the advanced child ask:) How much control do you have over the habits? (In contrast to the preceding item on resistance, the ability of the patient to control his/her compulsions is closely related to the severity of the compulsions.) 0 - COMPLETE CONTROL l - MUCH CONTROL experiences pressure to perform the behavior, but usually able to exercise voluntary control over it 2 - MODERATE CONTROL moderate control, strong pressure to perform behavior, can control it only with difficulty 3 - LITTLE CONTROL little control, very strong drive to perform behavior, must be carried to completion, can only delay with difficulty 4 - NO CONTROL no control, drive to perform behavior experienced as completely involuntary and overpowering, rarely able to even momentarily delay activity

22 11. INSIGHT INTO OBSESSIONS AND COMPULSIONS 18 Do you think your concerns or behaviors are reasonable? (Pause) What do you think would happen if you did not perform the compulsion(s)? Are you convinced something would really happen? (Rate patient's insight into the senselessness or excessiveness of his/her obsession(s) or compulsion(s) based on beliefs expressed at the time of the interview.) 0 - NONE excellent insight, fully rational l - MILD good insight, readily acknowledges absurdity or excessiveness of thoughts or behaviors but does not seem completely convinced that there isn't something besides anxiety to be concerned about (i.e., has lingering doubts) 2 - MODERATE fair insight, reluctantly admits thoughts or behavior seem unreasonable or excessive, but wavers; may have some unrealistic fears, but no fixed convictions 3 - SEVERE poor insight, maintains that thoughts or behaviors are not reasonable or excessive, but wavers; may have some unrealistic fears, but acknowledges validity of contrary evidence (i.e., overvalued ideas present) 4 - EXTREME lacks insight, delusional, definitely convinced that concerns and behavior are reasonable, unresponsive to contrary evidence 12. AVOIDANCE Have you been avoiding doing anything, going any place, or being with anyone because of your obsessional thoughts or out of concern you will perform compulsions? (If yes, then ask:) How much do you avoid? (note what is avoided on symptom list) (Rate degree to which patient deliberately tries to avoid things. Sometimes compulsions are designed to "avoid" contact with something that the patient fears. For example, excessive washing of fruits and vegetables to remove "germs" would be designated as a compulsion not as an avoidant behavior. If the patient stopped eating fruits and vegetables, then this would constitute avoidance.) 0 - NONE 1 - MILD minimal avoidance 2 - MODERATE some avoidance clearly present 3 - SEVERE much avoidance; avoidance prominent 4 - EXTREME very extensive avoidance, patient does almost everything he/she can to avoid triggering symptoms

23 13. DEGREE OF INDECISIVENESS 19 Do you have trouble making decisions about little things that other people might not think twice about (e.g., which clothes to put on in the morning, which brand of cereal to buy)? (Exclude difficulty making decisions which reflect ruminative thinking. Ambivalence concerning rationally-based difficult choices should also be excluded. 0 - NONE 1 - MILD some trouble making decisions about minor things 2 - MODERATE freely reports significant trouble making decisions that others would not think twice about 3 - SEVERE continual weighing of pros and cons about nonessentials 4 - EXTREME unable to make any decisions, disabling 14. OVERVALUED SENSE OF RESPONSIBILITY Do you feel overly responsible for what you do and what effect this has on things? Do you blame yourself for the things that are not within your control? (Distinguish from normal feelings of responsibility, feelings of worthlessness, and pathological guilt. A guilt-ridden person experiences him/herself or his/her actions as bad or evil.) 0 - NONE 1 - MILD only mentioned on questioning, slight sense of over responsibility 2 - MODERATE ideas stated spontaneously, clearly present, patient experiences significant sense of over-responsibility for events outside his/her reasonable control 3 - SEVERE ideas prominent and pervasive, deeply concerned he/she is responsible for events clearly outside his control, selfblaming farfetched and nearly irrational 4 - EXTREME delusional sense of responsibility (e.g., if an earthquake occurs 3,000 miles away patient blames themselves because they didn't perform their compulsions)

24 15. PERVASIVE SLOWNESS/DISTURBANCE OF INERTIA 20 Do you have difficulty starting or finishing tasks? Do many routine activities take longer than they should? (Distinguish from psychomotor retardation secondary to depression. Rate increased time spent performing routine activities even when specific obsessions cannot be identified). 0 - NONE 1 - MILD occasional delay in starting or finishing tasks/activities 2 - MODERATE frequent prolongation of routine activities but tasks usually completed, frequently late 3 - SEVERE pervasive and marked difficulty initiating and completing routine tasks, usually late 4 - EXTREME unable to start or complete routine tasks without full assistance 16. PATHOLOGICAL DOUBTING When you complete an activity do you doubt whether you performed it correctly? Do you doubt whether you did it at all? When carrying out routine activities do you find that you don't trust you senses (i.e. what you see, hear, or touch)? 0 - NONE 1 - MILD only mentioned on questioning, slight pathological doubt, examples given may be within normal range 2 - MODERATE ideas stated spontaneously, clearly present and apparent in some of patient's behaviors, patient bothered by significant pathological doubt; some effect on performance but still manageable 3 - SEVERE uncertainty about perceptions or memory prominent; pathological doubt frequently affects performance 4 - EXTREME uncertainty about perceptions constantly present; pathological doubt substantially affects almost all activities, incapacitating (e.g., patient states "my mind doesn't trust what my eyes see")

25 17. GLOBAL SEVERITY 21 Interviewer's judgement of the overall severity of the patient's illness. Rated from 0 (no illness) to 6 (most severe patient seen). (Consider the degree of distress reported by the patient, the symptoms observed, and the functional impairment reported. Your judgement is required both in averaging this data as well as weighing the reliability or accuracy of the data obtained. This judgement is based on information obtained during the interview.) 0 - NO ILLNESS 1 - SLIGHT illness slight, doubtful, or transient; no functional impairment 2 - MILD little functional impairment 3 - MODERATE functions with effort 4 - MODERATE-SEVERE limited functioning 5 - SEVERE functions mainly with assistance 6 - EXTREMELY SEVERE completely nonfunctional 18. GLOBAL IMPROVEMENT Rate total overall improvement present SINCE THE INITIAL RATING whether or not, in your judgement, it is due to drug treatment. 0 - very much worse 1 - much worse 2 - minimally worse 3 - no change 4 - minimally improved 5 - much improved 6 - very much improved

26 19. RELIABILITY 22 Rate the overall reliability of the rating scores obtained. Factors that may affect reliability include the patient's cooperativeness and his/her natural ability to communicate. The type and severity of obsessive-compulsive symptoms present may interfere with the patient's concentration, attention, or freedom to speak spontaneously (e.g., the content of some obsessions may cause the patient to choose his/her words very carefully). 0 - EXCELLENT no reason to suspect data unreliable 1 - GOOD factor(s) present that may adversely affect reliability 2 - FAIR factor(s) present that definitely reduce reliability 3 - POOR very low reliability

27 PATIENT NAME PATIENT ID CHILDREN'S YALE-BROWN OBSESSIVE COMPULSIVE SCALE (3/1/90) CY-BOCS TOTAL (add items 1-10) DATE RATER 23 None Mild Moderate Severe Extreme 1. TIME SPENT ON OBSESSIONS b. OBSESSION-FREE INTERVAL Moderately Extremely No Symptoms Long Long Short Short (do not add to subtotal or total score) INTERFERENCE FROM OBSESSIONS DISTRESS OF OBSESSIONS Always resists Completely yields 4. RESISTANCE Complete Much Moderate Little No control control control control control 5. CONTROL OVER OBSESSIONS OBSESSION SUBTOTAL (add items 1-5) None Mild Moderate Severe Extreme 6. TIME SPENT ON COMPULSIONS b. COMPULSION-FREE INTERVAL Moderately Extremely No Symptoms Long Long Short Short (do not add to subtotal or total score) INTERFERENCE FROM COMPULSIONS DISTRESS FROM COMPULSIONS Always resists Completely yields 9. RESISTANCE Complete Much Moderate Little No control control control control control 10. CONTROL OVER COMPULSIONS COMPULSION SUBTOTAL (add items 6-10) Excellent Absent 11. INSIGHT INTO O-C SYMPTOMS None Mild Moderate Severe Extreme 12. AVOIDANCE INDECISIVENESS PATHOLOGIC RESPONSIBILITY SLOWNESS PATHOLOGIC DOUBTING GLOBAL SEVERITY GLOBAL IMPROVEMENT RELIABILITY EXCELLENT = 0 GOOD = 1 FAIR = 2 POOR = 3

28 Instructions to Clinicians using the obsession and Compulsion Log The obsession and Compulsion Log (OCL) provides two kinds of clinical information. First, it illustrates the nature of a patient's current obsessions and compulsions. Second,it is an. -- index of clinical severity by providing information on the frequency of obsessions and the. amount of time spent engaged in compulsive rituals.' Typically, patients are instructed to record all obsessions and compulsions that occur over,the course of a single day. the time period within which obsessions and compulsions are recorded wi~l vary according to the patient's condition. For example, when obsessions are relatively infrequent, the patient may need to complete the log for several days or longer to,prcivide sufficient clinical data..on the other hand, patients with constant or very frequent' obsessio-ns'-may have difficulty completing the log for an entire 24-hour period. These patients can be,instructed to record obsessions and compulsions for some designated time period less than 24 hours.' When considering what time period to assign, remember the purpose of the oel is to obtain a sample of obsessions and compulsions adequate enough to.make clinical decisions. ' However,,~,.

29 OBSESSION AND COMPULSION LOG NAHE, _ DATE _ In the appropriate column below, please write each obsession (e.g., an unpleasant thought or image, a "contaminated" object, etc.) you encounter, the time of the obsession, the compulsion (e.g., washing, checking,. repeating a mental ritual) you performed in response to the obsession, and how long you spent performing the compulsion.. Time Obsession compulsion Duration.~.'

30 DAS S Name: Date: Please read each statement and circle a number 0, 1, 2 or 3 that indicates how much the statement applied to you over the past week. There are no right or wrong answers. Do not spend too much time on any statement. The rating scale is as follows: 0 Did not apply to me at all 1 Applied to me to some degree, or some of the time 2 Applied to me to a considerable degree, or a good part of time 3 Applied to me very much, or most of the time 1 I found myself getting upset by quite trivial things I was aware of dryness of my mouth I couldn't seem to experience any positive feeling at all I experienced breathing difficulty (eg, excessively rapid breathing, breathlessness in the absence of physical exertion) I just couldn't seem to get going I tended to over-react to situations I had a feeling of shakiness (eg, legs going to give way) I found it difficult to relax I found myself in situations that made me so anxious I was most relieved when they ended I felt that I had nothing to look forward to I found myself getting upset rather easily I felt that I was using a lot of nervous energy I felt sad and depressed I found myself getting impatient when I was delayed in any way (eg, elevators, traffic lights, being kept waiting) I had a feeling of faintness I felt that I had lost interest in just about everything I felt I wasn't worth much as a person I felt that I was rather touchy I perspired noticeably (eg, hands sweaty) in the absence of high temperatures or physical exertion I felt scared without any good reason I felt that life wasn't worthwhile Please turn the page

31 Reminder of rating scale: 0 Did not apply to me at all 1 Applied to me to some degree, or some of the time 2 Applied to me to a considerable degree, or a good part of time 3 Applied to me very much, or most of the time 22 I found it hard to wind down I had difficulty in swallowing I couldn't seem to get any enjoyment out of the things I did I was aware of the action of my heart in the absence of physical exertion (eg, sense of heart rate increase, heart missing a beat) I felt down-hearted and blue I found that I was very irritable I felt I was close to panic I found it hard to calm down after something upset me I feared that I would be "thrown" by some trivial but unfamiliar task I was unable to become enthusiastic about anything I found it difficult to tolerate interruptions to what I was doing I was in a state of nervous tension I felt I was pretty worthless I was intolerant of anything that kept me from getting on with what I was doing I felt terrified I could see nothing in the future to be hopeful about I felt that life was meaningless I found myself getting agitated I was worried about situations in which I might panic and make a fool of myself I experienced trembling (eg, in the hands) I found it difficult to work up the initiative to do things

32 DAS S Scoring Template S A D A D S A S A D S S D S A D D S A A D Apply template to both sides of sheet and sum scores for each scale. For short (21-item) version, multiply sum by 2.

33 111 British Journal of Clinical Psychology (2003), 42, The British Psychological Society The Depression Anxiety Stress Scales (DASS): Normative data and latent structure in a large non-clinical sample John R. Crawford* and Julie D. Henry Department of Psychology, King s College, University of Aberdeen, UK Objectives. To provide UK normative data for the Depression Anxiety and Stress Scale (DASS) and test its convergent, discriminant and construct validity. Design. Cross-sectional, correlational and confirmatory factor analysis (CFA). Methods. The DASS was administered to a non-clinical sample, broadly representative of the general adult UK population (N = 1,771) in terms of demographic variables. Competing models of the latent structure of the DASS were derived from theoretical and empirical sources and evaluated using confirmatory factor analysis. Correlational analysis was used to determine the influence of demographic variables on DASS scores. The convergent and discriminant validity of the measure was examined through correlating the measure with two other measures of depression and anxiety (the HADS and the sad), and a measure of positive and negative affectivity (the PANAS). Results. The best fitting model (CFI =.93) of the latent structure of the DASS consisted of three correlated factors corresponding to the depression, anxiety and stress scales with correlated error permitted between items comprising the DASS subscales. Demographic variables had only very modest influences on DASS scores. The reliability of the DASS was excellent, and the measure possessed adequate convergent and discriminant validity Conclusions. The DASS is a reliable and valid measure of the constructs it was intended to assess. The utility of this measure for UK clinicians is enhanced by the provision of large sample normative data. The Depression Anxiety Stress Scale (DASS) is a 42-item self-report measure of anxiety, depression and stress developed by Lovibond and Lovibond (1995) which is increasingly used in diverse settings. Its popularity is partly attributable to the fact *Requests for reprints should be addressed to John R. Crawford, Department of Psychology, King s College, University of Aberdeen AB24 3HN, UK ( j.crawford@abdn.ac.uk).

34 112 John Crawford and Julie D. Henry that, unlike many other self-report scales, the DASS is in the public domain (i.e. the measure can be used without incurring any charge). The DASS was originally intended to consist of only two subscales one measuring anxiety, the other depression each composed of items that were purportedly unique to either construct. Ambiguous items (i.e. items non-specifically related to depression and anxiety) were not included in the measure but were regarded as controls. This strategy was adopted because the authors original intention was to develop measures that would maximally discriminate between depression and anxiety. However, during scale development it was revealed that the control items tended to form a third group, of items characterized by chronic nonspecific arousal. More items were added to this group and the third scale, the stress scale, emerged. Lovibond and Lovibond maintain that, although this scale is related to the constructs of depression and anxiety, it nevertheless represents a coherent measure in its own right. Whilst Lovibond and Lovibond s (1995) attempt to develop a measure that maximally discriminates between the constructs of depression and anxiety is not unique (Beck, Epstein, Brown, & Steer, 1988; Costello & Comrey, 1967), the strategy adopted for scale construction is. Conventionally, items are derived from pre-existing anxiety and depression scales, with factor analyses of clinical data used to identify those which measure different constructs. By contrast, Lovibond and Lovibond employed predominantly non-clinical samples for scale development on the basis that depression and anxiety represent dimensional, not categorical, constructs. Moreover, core symptoms of anxiety and depression which were unique to one but not both of the disorders were identified from the outset, and not on an a posteriori basis. Thus, unconventionally, the initial items selected were retained, with new items compatible with the emerging factor definitions successively added. Preliminary evidence has been presented, which suggests that the DASS does possess adequate convergent and discriminant validity (Lovibond & Lovibond, 1995). A large student sample (N = 717) was administered the Beck Depression Inventory (BDI; Beck, Ward, Mendelsohn, Mock, & Erbaugh, 1961), the Beck Anxiety Inventory (BAI; Beck et al., 1988) and the DASS. The BAI and DASS anxiety scale were highly correlated (r =.81), as were the BDI and DASS depression scale (r =.74). However, betweenconstruct correlations were substantially lower (r =.54 for DASS depression and BAI; r =.58 for DASS anxiety and BDI). Moreover, Antony, Bieling, Cox, Enns, and Swinson (1998) found a similar pattern of correlations in a clinical sample. To assess the DASS s psychometric properties, Lovibond and Lovibond (1995) administered the measure to a large non-clinical sample (N = 2,914). It was found that reliability, assessed using Cronbach s alpha, was acceptable for the depression, anxiety and stress scales (.91,.84 and.90, respectively). These values are similar to those obtained from clinical populations (Antony et al., 1998; Brown, Chorpita, Korotitsch, & Barlow, 1997). At present, interpretation of the DASS is based primarily on the use of cut-off scores. Lovibond and Lovibond (1995) presented severity ratings from normal to extremely severe on the basis of percentile scores, with 0 78 classified as normal, as mild, as moderate, as severe, and as extremely severe. However, these original norms were based predominantly on students. This means that the generalizability of their results to the normal population is uncertain. Moreover, although 1,307 of the participants in this study were non-students, no information was presented regarding whether they were broadly representative of the general

35 DASS in a non-clinical sample population; all that was stated was that they were white and blue collar workers (Lovibond & Lovibond, 1995, p. 9). Relatedly, the influence of demographic characteristics on DASS scores has gone largely uninvestigated. In development of the DASS, this analysis was restricted to gender and age. Although the test authors did not state explicitly whether age and/or gender yielded a significant effect,... there was a trend towards higher scores in the youngest and oldest age brackets (Lovibond & Lovibond, 1995, p. 28). However, Andrew, Baker, Kneebone, and Knight (2000) found that in a sample of elderly community volunteers (N = 53), scores on all three DASS subscales were almost half those reported by Lovibond and Lovibond. It is possible that this discrepancy is attributable to idiosyncrasies in one or both of these samples or the influence of potential mediating factors such as years of education or occupation. Yet no study to date has assessed the influence of either of these latter variables. The relationships between demographic variables and DASS scores in the general population are of interest in their own right, but investigation of these relationships would also serve the very practical purpose of identifying whether normative data should be stratified. If the use of the DASS in research and clinical practice is to be optimal, then it is also necessary to delineate the underlying structure of the instrument. This is particularly important given that Lovibond and Lovibond (1995) found through empirical analyses that, in both clinical and non-clinical samples, symptoms conventionally regarded as core to the syndrome of depression (American Psychiatric Association, 1994) were actually extremely weak markers of this construct. Specifically, items pertaining to changes in appetite, sleep disturbance, guilt, tiredness, concentration loss, indecision, agitation, loss of libido, diurnal variation in mood, restlessness, irritability and crying were excluded from the measure. Moreover, the legitimacy of the stress scale as an independent measure must be assessed. In an influential series of papers, Clark and Watson (Clark & Watson, 1991a, 1991b; Watson, Clark, & Tellegen, 1988) have argued that anxiety and depression have an important shared component which they call negative affectivity (NA). NA is a dispositional dimension, with high NA reflecting the experience of subjective distress and unpleasurable engagement, manifested in a variety of emotional states such as guilt, anger and nervousness, and low NA represented by an absence of these feelings (Watson & Clark, 1984). Studies have supported the existence of a dominant NA dimension (Watson & Clark, 1984; Watson & Tellegen, 1985) and provide evidence that it is highly related to the symptoms of both anxiety and depression (Brown et al., 1997; Watson, Clark, Weber et al., 1995; Watson, Weber et al., 1995). Thus, there are strong theoretical grounds for suggesting that the stress scale is simply a measure of NA, particularly given that this scale actually originated from items believed to relate to both dimensions. To date, four studies have directly tested the construct validity of the DASS (Antony et al., 1998; Brown et al., 1997; Clara, Cox, & Enns, 2001; Lovibond & Lovibond, 1995). Lovibond and Lovibond (1995) conducted a principal-components analysis in a student sample (N = 717) which revealed that the first three factors accounted for a high proportion of the variance. Furthermore, all items loaded on their designated factor except for anxiety item 30 ( I feared that I would be thrown by some trivial but unfamiliar task ) which loaded on the stress factor. In the same sample, a confirmatory factor analysis (CFA) was then used to quantitatively compare the fit of a single-factor model, a two-factor model (in which depression was one factor, and anxiety and stress were collapsed into another) and a three-factor model corresponding to the three DASS 113