Eriksen Dorte, Rosthøj Susanne, Burr Hermann, Holtermann Andreas
National Research Centre for the Working Environment, Copenhagen, Denmark.
Section of Biostatistics, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
Prev Med. 2015 Apr;73:1-5. doi: 10.1016/j.ypmed.2014.12.038. Epub 2015 Jan 6.
The aim of this study is to investigate the association between five-year changes in occupational sitting and body mass index (BMI) in working adults.
We analyzed data from The Danish Work Environment Cohort Study (2005 and 2010, n=3.482). Data on occupational sitting, weight, height and several potential confounders were self-reported. The association between change in occupational sitting (hours) (categorized as large decrease <-7.5, moderate decrease -7.5 to <-2.5, no change -2.5 to 2.5, moderate increase >2.5 to 7.5 and large increase >7.5) and change in BMI was explored by multiple linear regression analyses.
43.0% men and 36.1% women had high occupational sitting time (≥25h per week) at baseline. 31.8% men and 27.2% women decreased while 30.0% men and 33.0% women increased occupational sitting. The proportion of obese (BMI≥30) increased almost 3% for both genders. BMI changed 0.13 (CI: 0.06; 0.20, p=0.0003), per category of change in occupational sitting in women, but no association was found in men.
In women, there is a positive association between five-year changes in occupational sitting and BMI.
本研究旨在调查在职成年人职业坐姿的五年变化与体重指数（BMI）之间的关联。
我们分析了丹麦工作环境队列研究（2005年和2010年，n = 3482）的数据。职业坐姿、体重、身高及其他一些潜在混杂因素的数据均通过自我报告获得。通过多元线性回归分析探讨职业坐姿变化（小时数）（分为大幅减少<-7.5、中度减少-7.5至<-2.5、无变化-2.5至2.5、中度增加>2.5至7.5以及大幅增加>7.5）与BMI变化之间的关联。
基线时，43.0%的男性和36.1%的女性职业坐姿时间较长（每周≥25小时）。31.8%的男性和27.2%的女性职业坐姿时间减少，而30.0%的男性和33.0%的女性职业坐姿时间增加。男女肥胖（BMI≥30）比例均增加了近3%。女性中，职业坐姿每变化一个类别，BMI变化0.13（置信区间：0.06；0.20，p = 0.0003），但在男性中未发现关联。
在女性中，职业坐姿的五年变化与BMI之间存在正相关。
