中年时期的久坐行为与随后的体重指数。
Sedentary behaviours in mid-adulthood and subsequent body mass index.
机构信息
Centre for Paediatric Epidemiology and Biostatistics, UCL Institute of Child Health, University College London, London, United Kingdom.
出版信息
PLoS One. 2013 Jun 7;8(6):e65791. doi: 10.1371/journal.pone.0065791. Print 2013.
OBJECTIVES
It is unclear whether sedentary behaviour, and the domain in which it occurs, is related to body mass index (BMI) change. We aim to elucidate whether sedentary behaviour is prospectively related to BMI change using markers from three domains (leisure, work and commuting).
METHODS
Among employed 1958 British birth cohort members (n = 6,562), we analysed whether TV-viewing, work sitting (six categories: 0 h/d to >4 h/d) and motorised commuting (at 45 y) were related to BMI (at 45 y and 50 y) and BMI change 45-50 y, after adjusting for lifestyle and socioeconomic factors.
RESULTS
Per category higher TV-viewing, 45 y and 50 y BMI were higher by 0.69 kg/m(2) (95% CI: 0.59,0.80) and 0.75 kg/m(2) (0.64,0.86) respectively. A category higher TV-viewing was associated with 0.11 kg/m(2) (0.06,0.17) increased BMI 45-50 y, attenuating to 0.06 kg/m(2) (0.01,0.12) after adjustment. There was no trend for work sitting with 45 y or 50 y BMI, nor, after adjustment, for BMI change. However, those sitting 2-3 h/d had greater BMI gain by 0.33 kg/m(2) (0.10,0.56) compared to those sitting 0-1 h/d. Associations between TV-viewing and BMI change were independent of work sitting. Motorised commuting was associated with 45 y, but not 50 y BMI or change.
CONCLUSIONS
TV-viewing is associated with BMI gain in mid-adulthood; evidence is weaker for other sedentary behaviours.
目的
目前尚不清楚久坐行为及其发生领域是否与体重指数（BMI）变化有关。我们旨在阐明使用三个领域（休闲、工作和通勤）的标志物，久坐行为是否与 BMI 变化呈前瞻性相关。
方法
在参与 1958 年英国出生队列的 6562 名在职人员中，我们分析了看电视、工作时久坐（六类：每天 0 小时至 >4 小时）和机动通勤（45 岁时）与 BMI（45 岁和 50 岁时）以及 45-50 岁 BMI 变化的关系，调整了生活方式和社会经济因素。
结果
每增加一类看电视，45 岁和 50 岁时的 BMI 分别增加 0.69kg/m²（95%CI：0.59，0.80）和 0.75kg/m²（0.64，0.86）。看电视时间每增加一个等级，45-50 岁 BMI 增加 0.11kg/m²（0.06，0.17），调整后增加 0.06kg/m²（0.01，0.12）。与 45 岁或 50 岁 BMI 相比，工作时久坐没有趋势，调整后 BMI 变化也没有趋势。然而，与每天坐 0-1 小时的人相比，每天坐 2-3 小时的人 BMI 增加了 0.33kg/m²（0.10，0.56）。看电视与 BMI 变化之间的关联独立于工作时久坐。机动通勤与 45 岁时 BMI 相关，但与 50 岁 BMI 或变化无关。
结论
看电视与成年人中期 BMI 增加有关；其他久坐行为的证据较弱。
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