title: Prevalence and sociodemographic trends of weight misperception in Korean adolescents.
abstract: BACKGROUND
  Rapid physical and emotional growth occurs during youth. Adolescence is one of the most important periods for adapting to body change and establishing an ideal body image. Body change is an important and sensitive concern for adolescents, and the values and self-conception established at this time affect various aspects of the entire life. This study aimed to investigate the prevalence and trends of weight misperception among adolescents in Korea.
  
  
  METHODS
  We analyzed raw data from the 2011 Korea Youth Risk Behaviour Web-based Survey-VII (KYRBWS-VII), in which 73,474 adolescents from the middle-school first grade to the high-school third grade (aged 12-18) participated. For the multivariate logistic regression model, the dependent variable was existence of misperception (yes/no) and independent variables were sociodemographic factors.
  
  
  RESULTS
  We found that the prevalence of weight misperception was 49.3% (overestimation, 23.7%; underestimation, 25.6%). Among male students, 65.0% underestimated their weight, whereas 62.2% of female students overestimated their weight. Multivariate logistic regression analysis revealed that gender (OR = 1.254; 95% CI = 1.214-1.294; p < 0.001) and socioeconomic status (OR = 1.173; 95% CI = 1.121-1.228; p < 0.001) were significantly associated with weight misperception. Compared with overweight/obese adolescents, adolescents whose BMI-based body weight was underweight or normal showed 2.386-times higher (OR = 2.386; 95% CI = 2.045-2.783, p < 0.001) and 32.804-times higher (OR = 32.804; 95% CI = 29.829-36.077, p < 0.001) body shape misperception, respectively.
  
  
  CONCLUSIONS
  An effective obesity intervention program for adolescents must reflect and monitor body shape perception as well as BMI, and should include subjects who overestimate as well as underestimate their weight.
authors.forename: Seonho
authors.initials: S
authors.lastname: Kim
authors.affiliation: Department of Human Movement Science, Seoul Women's University, Seoul, South Korea. wowso@swu.ac.kr.
authors.forename: Wi-Young
authors.initials: WY
authors.lastname: So
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D016497:Adolescent Health Services; D001828:Body Image; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009765:Obesity / Q000453:epidemiology* / Q000523:psychology; D010465:Perception; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology; D012309:Risk-Taking; D012959:Socioeconomic Factors; D013334:Students / Q000523:psychology