KU Leuven Department of Rehabilitation Sciences, Tervuursevest 101, 3001, Leuven, Belgium.
KU Leuven, University Psychiatric Center KU Leuven, Leuvensesteenweg 517, 3070, Kortenberg, Belgium.
Int J Behav Nutr Phys Act. 2018 Aug 8;15(1):73. doi: 10.1186/s12966-018-0708-y.
Depression is common and burdensome in adolescents. Understanding modifiable environmental risk factors is essential. There is evidence that physical activity is protective of depression. However, the impact of sedentary behavior (SB) on depression is relatively under-researched especially in low- and middle-income countries (LMICs). In this cross-sectional study, we explored the association between SB and depressive symptoms in adolescents from 30 LMICs, controlling for confounders including physical activity.
Data from the Global school-based Student Health Survey were analyzed in 67,077 adolescents [mean (SD) age 13.8 (0.9) years; 50.6% girls). Self-report measures assessed depressive symptoms during the past 12 months, and SB, which was a composite variable assessing time spent sitting and watching television, playing computer games, talking with friends during a typical day excluding the hours spent sitting at school and doing homework. Multivariable logistic regression analysis was conducted and a countrywide meta-analysis undertaken.
The prevalence of depressive symptoms and ≥ 3 h/day of SB were 28.7 and 30.6%, respectively. There was a linear increase in the prevalence of depressive symptoms with increasing sedentary time beyond ≥3 h/day (vs. < 1 h/day). Among boys, 1-2 h/day of SB was associated with lower odds for depression (vs. < 1 h/day). Countrywide meta-analysis demonstrated that spending ≥3 h/day versus < 3 h/day was associated with a 20% increased odds for depressive symptoms (OR = 1.20; 95% CI = 1.16-1.24) with low between-country heterogeneity (I = 27.6%).
Our data indicate that being sedentary for ≥3 h/day is associated with increased odds for depressive symptoms in adolescence. Future longitudinal data are required to confirm/refute the findings to inform public interventions which aim to limit the time spent being sedentary in adolescents.
抑郁在青少年中很常见，且负担沉重。了解可改变的环境风险因素至关重要。有证据表明，身体活动对抑郁有保护作用。然而，久坐行为（SB）对抑郁的影响相对研究较少，特别是在中低收入国家（LMICs）。在这项横断面研究中，我们探讨了 30 个 LMICs 中青少年 SB 与抑郁症状之间的关系，控制了包括身体活动在内的混杂因素。
对全球学校学生健康调查中的 67077 名青少年[平均（SD）年龄 13.8（0.9）岁；50.6%为女孩]的数据进行了分析。自我报告的措施评估了过去 12 个月的抑郁症状，以及 SB，这是一个综合变量，评估了在典型的一天中除了坐在学校和做作业的时间之外，坐着和看电视、玩电脑游戏、与朋友交谈的时间。进行了多变量逻辑回归分析，并进行了全国范围的荟萃分析。
抑郁症状的患病率和每天超过 3 小时的 SB 分别为 28.7%和 30.6%。随着久坐时间超过每天≥3 小时，抑郁症状的患病率呈线性增加（与每天<1 小时相比）。在男孩中，每天 1-2 小时的 SB 与较低的抑郁风险相关（与每天<1 小时相比）。全国范围的荟萃分析表明，每天花费≥3 小时与每天花费<3 小时相比，抑郁症状的几率增加了 20%（OR=1.20；95%CI=1.16-1.24），且国家间异质性较低（I=27.6%）。
我们的数据表明，每天久坐≥3 小时与青少年抑郁症状的几率增加有关。需要未来的纵向数据来证实/反驳这些发现，以指导旨在限制青少年久坐时间的公共干预措施。
