Watanabe Kazuhiro, Kawakami Norito
Department of Mental Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Int J Behav Med. 2018 Dec;25(6):637-648. doi: 10.1007/s12529-018-9747-7.
This study aimed to investigate effects of a flexible multi-component workplace intervention program for improving physical activity among Japanese white-collar employees in a cluster randomized controlled trial design.
A total of 208 worksites and nested employees were approached. Any worksite interested in a 3-month physical activity promotion intervention and white-collar workers aged 18 years or older were eligible. The worksites were randomly assigned to an intervention or a control, stratified by worksite size. The intervention worksites were offered an intervention program that allows these worksites to select intervention components from a set of options, including environmental changes. The control worksites were offered feedback and basic occupational health services. Physical activity level was measured using a self-reported questionnaire at baseline and at 3 and 6 months of follow-up.
Three worksites (92 employees) were allocated to the intervention and five worksites (98 employees) to the control worksites. The overall physical activity level in the intervention worksites significantly increased compared with the control worksites (Coeff = 0.45, SE = 0.19, p = 0.018). For subgroup analyses, the intervention effect on the overall physical activity level was significant among medium- and large-sized worksites but not among small-sized worksites.
This trial showed a significant and positive effect of the intervention program on physical activity. The program is unique because of its flexibility and feasibility. However, small worksites might receive less benefit from the program, indicating a need for further support and/or new technologies.
UMIN Clinical Trials Registry (ID=UMIN000024069).
本研究旨在通过整群随机对照试验设计，调查一项灵活的多成分工作场所干预计划对提高日本白领员工身体活动水平的影响。
共联系了208个工作场所及其内部员工。任何有兴趣参与为期3个月身体活动促进干预的工作场所，以及18岁及以上的白领员工均符合条件。工作场所按规模分层，随机分为干预组或对照组。干预组工作场所可从包括环境改变在内的一系列选项中选择干预成分，接受干预计划。对照组工作场所则提供反馈和基本职业健康服务。在基线以及随访3个月和6个月时，使用自我报告问卷测量身体活动水平。
3个工作场所（92名员工）被分配到干预组，5个工作场所（98名员工）被分配到对照组。与对照组相比，干预组工作场所的总体身体活动水平显著提高（系数=0.45，标准误=0.19，p=0.018）。亚组分析显示，干预对中大型工作场所的总体身体活动水平有显著影响，但对小型工作场所没有显著影响。
该试验表明干预计划对身体活动有显著的积极影响。该计划因其灵活性和可行性而独具特色。然而，小型工作场所可能从该计划中获益较少，这表明需要进一步的支持和/或新技术。
UMIN临床试验注册库（ID=UMIN000024069）。
