Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 49 4 2020 04 01 637 644 EN Youngyun JIN College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea Jinkyung CHO College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea Inhwan LEE College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea Soohyun PARK College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea Donghyun KIM College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea Jiyoung KONG College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea Hyunsik KANG College of Sport Science, Sungkyunkwan University, Suwon, Republic of Korea 2017 09 18 2018 05 09 Background: To investigate the association between involuntary weight loss (IWL) and late-life depression (LLD) in a population-based cohort study. Methods: Data (N=6945) obtained from the 2008 baseline and 2011 follow-up assessments of the Living Profiles of Older People Survey in Korea were used. Changed body weight between the 2008 and 2011 was classified into stable weight (<-5% ~ <+5%), lightweight loss (≥-5% ~ <-10%), moderate weight loss (≥-10%), lightweight gain (+≥5 ~ <+10%), and moderate weight gain (≥+10%). Results: Compared to the stable weight group, the moderate weight loss group had a higher risk of LLD (odds ratio=1.99, 95% confidence interval=1.61-2.46, P<0.001) even after adjustments for covariates, including age, BMI, education, income, life of solitude, smoking, physical activity, dependent aging, comorbidity, and cognitive function. Conclusion: IWL is significantly associated with LLD in Korean older adults, implying the prognostic importance of IWL for presenting mental health issues later in life. https://ijph.tums.ac.ir/index.php/ijph/article/view/11102 https://ijph.tums.ac.ir/index.php/ijph/article/download/11102/6877