Korean J Health Promot KJHP Korean Journal of Health Promotion 2234-2141 2093-5676 Korean Society for Health Promotion and Disease Prevention 10.15384/kjhp.2017.17.1.31 Original Article Secular Trends for Body-shape Perception, Weight-loss Efforts, and Weight-loss Behaviors in Korean Adults Using the Korea National Health and Nutrition Examination Survey from 2001 to 2014 Lim Gyeong Eun Kang Sun-Young Kim Yang Keun Kim Hye Won Park Tae Jin Kim Jinseung Lee Kayoung Department of Family Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea. Corresponding author: Kayoung Lee MD, MPH, PhD. Department of Family Medicine, Busan Paik Hospital, Inje University College of Medicine, 75 Bokji-ro, Busanjin-gu, Busan 47392, Korea. Tel: +82-51-890-6229, Fax: +82-51-894-7554, Kayoung.fmlky@gmail.com 03 2017 31 03 2017 17 1 31 37 08 03 2017 28 03 2017 Copyright © 2017 Korean Society for Health Promotion and Disease Prevention 2017 This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Background

The objective of study was to investigate secular trends for body-shape perception, weight-loss efforts, and weight-loss behaviors from 2001 to 2014 in Korean adults and factors related to those weight-related attitude.

 Methods

Self-reported body-shape perception, weight-loss efforts, and weight-loss behaviors were used in 26,480 men and 35,051 women aged 19 or older using the Korean National Health and Nutrition Survey from 2001 to 2014 (from 2005 to 2014 for weight-loss behaviors). Multivariable logistic regression analysis was conducted using complex sampling design in each sex.

 Results

Body-shape misperception tended to decrease from 2001 to 2014 and weight-loss efforts tended to increase over the period in all subjects, whereas unhealthy weight-loss behaviors tended to increase over the period in women. In multivariable logistic regression model, body-shape misperception in men was inversely associated with survey year, while positively associated with age and weight status. In women, body-shape misperception was inversely associated with survey year, education, and income, while positively associated with age and weight status. Weight-loss efforts in both sexes were inversely associated with age, while positively associated with survey year, education, income, and weight status. Healthy weight-loss behaviors were positively associated with education but inversely associated with age in men. In women, those behaviors were positively associated with education and weight status, while inversely associated with survey year.

 Conclusions

We found decreased body-shape misperception and increased weight-loss efforts in Korean men and women from 2001 to 2014, and decreased healthy weight-loss behaviors in women from 2005 to 2014.

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Abbreviation: NA, not available.

Values are percent ± standard error using complex sampling design analysis.

P for trend was analyzed using linear-by-linear association of chi-square test.

P<0.05 between men and women using chi-squared test.

 Factors associated with under- or overestimation of body-shape

Abbreviations: OR, odds ratio; CI, confidence interval.

Multiple logistic regression model including survey year, age, education, income, and weight status as independent variables using complex sampling design.

 Factors associated with weight-loss efforts

Abbreviations: OR, odds ratio; CI, Confidence interval.

Multiple logistic regression model including survey year, age, education, income, and weight status as independent variables using complex sampling design.

 Factors associated with healthy weight-loss behaviors

Abbreviations: OR, odds ratio; CI, Confidence interval.

Multiple logistic regression model including survey year, age, education, income, and weight status as independent variables using complex sampling design.

 The relationships of weight-loss behaviors (healthy vs. unhealthy) with weight status and body-shape perception in women

Values are percent ± standard error using complex sampling design analysis.

Using chi-squared test.