weight perception, weight reduction, telephone interview 183 (16.8 ) 411 (37.7 ) (40.9 ) (31.8 ) (30.4 ) 8.5 ( 2001; 11: )

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1 weight perception, weight reduction, telephone interview ( 78.3 ) 554 (50.8 ) 537 (49.2 ) (16.8 ) (9.3 ) (37.7 ) (40.9 ) (31.8 ) (21.8 ) (17.4 ) (80.2 ) (66.3 ) (30.4 ) ( 2001; 11: )

2 A Study of Weight Perception and Weight Reduction Behavior Yin-Fan Chang 1, Feng-Hwa Lu 2, Chih-Hsing Wu 2, Chin-Song Chang 2, Kun-Ling Wu 2 and Chih-Jen Chang 2 To assess the weight reduction behaviors, strategies, and goals of the general population, a total of 1091 subjects aged 20 to 49 years living in Taiwan were surveyed by telephone interview during Dec 22 and 23, These 1,091 subjects represented 78.3% of total telephones called. Among them, 554 (50.8%) were male and 537 (49.2%) were female. 183(16.8%) of the 1091 subjects reported having had on diet at least once in this survey, 50 subjects were males and 133 subjects were females. Moreover, 101(9.3%) subjects reported that they were trying to lose weight during the survey, 31 subjects were males and 70 subjects were females. On the aspect of weight perception, 411 subjects (37.7%) believed they were overweight or obese, 180 subjects were males and 231 subjects were females. The most preferred part to be thinner was around the abdomen for both sexes. The second preferred place was the waist for men, and the thigh and gluteal region for women. Diet control (80.2%) and exercise (66.3%) were the two most common weight-reduction strategies with highest satisfaction. Notably, the use of dietary medicine (30.4%) was the 3rd most common strategy. Among the 101 subjects who were trying to lose weight, the average expected weight loss was 8.5kg; men had higher expected weight loss (10.7kg) than women (7.5kg) did. The average time expected to reach their goal of weight reduction was 52 days, 45 days for men and 55 days for women, which was not a significant gender difference. Our study revealed that weight perception and weight loss behaviors among adults in Taiwan were not appropriately established. To avoid improper weight-reduction strategies and to meet the goals of obesity prevention and weight reduction in a healthy manner, more education and consultation are needed. (Chin J Fam Med 2001; 11: ) Section of Family Medicine, Chiai Hospital, Department of Health 1 ; Department of Family Medicine, NCKUH 2, Tainan, Taiwan, R.O.C. Received: July 4, 2002; Accepted: November 5, , The Behavioral Risk Factor Surveillance System 5 (BRFSS)

3 , ( ) (primary sampling XXXX units) ( ) ,075 ) (1,436 ) (479 ) (302 ) (293 ) (116 ) (82 ) 1091 ( ) ( ( / ) 242 ( / ) 314 ( / / / ) 29 ( ) ( ) 23 ( ) (computer-assisted telephone interviewing, CATI) 6 SPSS (version 8.0) ( ) (Pearson chi-square test) Student's t (one-way ANOVA) p 0.05

4 1, (50.8 ) 537 (49.2 ) ( ) (38.2 ) ( ) ( ) (40.7 ) (43.5 ) ( ) (39.8 ) 3 5 (38.0 ) 1 3 (37.3 ) 1, (16.8 ) ( 2) 50 ( 9.0 ) (15.2 ) 133 ( 24.8 ) 32.9

5 (p<0.001)

8 (62.1 ) (3.0 ) 66.4 101 (9.3 ) 31 5.6 70 13.1 ( 6) 8.5 7.

6 512 (46.9 ) ( 4) 195 (38.1 ) 317 (61.9 ) (40.9 ) (31.8 ) (21.8 ) (17.4 ) (82.0 ) (83.5 ) " " (30.4 ) 36.8 (62.1 ) (3.0 ) (9.3 ) ( 6) (p<0.05) (p<0.05) (p=0.370) (p<0.05)

7 (telephone interview) 16 (face-to-face interview) (response rate) 17,18 (bias) The 3rd National Health And Nutrition Examination Survey (NHANESIII) ( 97.3 ) BRFSS the Minnesota heart 21 survey BRFSS BRFSS 5 (body image) 19

8 BRFSS BRFSS (misperception) 5,6,21 (10.7 v.s. 7.5 ) (3.7 v.s. 6.3 ) BRFSS (8.6 v.s. 8.9 ) BRFSS ( ) ,

9 1. Seidell JC: The epidemiology of obesity. In: Bjorntorp P ed. International Textbook of Obesity. 1st ed. New York: John Wiley Sons, 2000: Sorenson TIA: The changing lifestyle in the world: body weight and what else? Diabetes Care 2000; 23(suppl 2): B Douketis JD, Feightner JW, Attia J, Feldman WF: Periodic health examination, 1999 update: 1.detection, prevention and treatment of obesity. CMAJ 1999; 160: Khaodhiar L, Blackburn: Health benefits and risks of weight loss. In: Bjorntorp P ed. International Textbook of Obesity. 1st ed. New York: John Wiley Sons, 2000: Serdular MK, Mokdad AH, Williamson DF, Galuska DA, Mendlein JM, Heath GW: Prevalence of attempting weight loss and strategies for controlling weight. JAMA 1999; 282: Timperio A, Cameron-Smith D, Burns C, Crawford D: The public's response to the obesity epidemic in Australia: weight concerns and weight control practices of men and women. Public Health Nutr 2000; 3: Antipatis VJ, Gill TP: Obesity as a global problem. In: Bjorntorp P ed. International Textbook of Obesity. 1st ed. New York: John Wiley Sons, 2000: Wong Y, Chen SL, Chan YC, Wang MF, Yamamoto S: Weight satisfaction and dieting practices among college males in Taiwan. J Am Coll Nutr 1999; 18: Wong Y, Huang YC: Obesity concerns, weight satisfaction and characteristics of female dieters:a study on female Taiwanese college students. J Am Coll Nutr 1999; 18: Chen MY, Huang LH, Wang EK, et al: The effectiveness of health promotion counseling for overweight adolescent nursing students in Taiwan. Public Health Nurs 2001; 18: Chang FT, Hu SH, Wang RS: The effectiveness of dietary instruction in obese school children of southern Taiwan. Kaohsiung J Med Sci 1998; 14: Kelsey JL, Whittemore AS, Evans AS, Thompson WD: Methods in Observational Epidemiology. 2nd ed. New York: Oxford University Press; 1996: Bowlin SJ, Morrill BD, Nafziger AN, Jenkins PL, Lewis C, Pearson TA: Validity of cardiovascular disease risk factors assessed by telephone survey: the behavioral risk factor survey. J Clin Epidemiol 1993; 46: Brogan DJ, Denniston MM, Liff JM, Flagg EW, Coates RJ, Brinton LA: Comparison of telephone sampling and area sampling: response rates and within-household coverage. Am J Epidemiol 2001; 153: Ford ES: Characteristics of survey participants with and without a telephone: findings from the third national health and nutrition examination survey. J Clin Epidemiol 1998; 51:

10 Serdula MK, Collins ME, Williamson DF, Anda RF, Pamuk E, Bayers TE: Weight control practices of U.S. adolescents and adults. Ann Intern Med 1993; 119: Jackson C, Jatulis DE, Fortmann SP: The behavioral risk factor survey and the Stanford five-city project survey: a comparison of cardio-vascular risk behavior estimates. Am J Public Health 1992; 82:

Judy Kruger, PhD, MS, Deborah A. Galuska, PhD, MPH, Mary K. Serdula, MD, MPH, Deborah A. Jones, PhD

Attempting to Lose Weight Specific Practices Among U.S. Adults Judy Kruger, PhD, MS, Deborah A. Galuska, PhD, MPH, Mary K. Serdula, MD, MPH, Deborah A. Jones, PhD Background: Methods: Results: Conclusions: