Mantzari Eleni, Galloway Catherine, Wijndaele Katrien, Brage Soren, Griffin Simon J, Marteau Theresa M
Behaviour and Health Research Unit, University of Cambridge, Cambridge, UK.
MRC Epidemiology Unit, University of Cambridge, Cambridge, UK.
Prev Med Rep. 2018 Nov 26;13:64-72. doi: 10.1016/j.pmedr.2018.11.012. eCollection 2019 Mar.
Uncertainties remain about the overall effect of sit-stand desks for reducing prolonged sitting among office-based workers. This study assessed the feasibility of a randomised controlled trial of the impact of workplace sit-stand desks on overall energy expenditure, sitting time and cardio-metabolic outcomes. It involved four phases: Phase I: online survey; Phase II: workspace auditing; Phase III: randomised intervention (provision of sit-stand desks at work for 3 months); Phase IV: qualitative component. Participants were offıce-based employees of two companies in Cambridge, England. Among Phase I participants interested in the trial, 100 were randomised to Phase II. Of those with workspaces suitable for sit-stand desks, 20 were randomised to Phase III. Those allocated to the intervention completed Phase IV. Outcomes included: trial participation interest, desk-type (full desks/desk mounts) and assessment location (work/laboratory/home) preferences (Phase I); proportion of workspaces permitting sit-stand desk installation (Phase II); energy expenditure, sitting time and cardio-metabolic outcomes (Phase III); study participation experiences (Phase IV). Data were collected between May 2015 and December 2016. Recruitment and trial implementation were feasible: 92% of survey respondents expressed participation interest; 80% of workspaces could accommodate sit-stand desks; assessments were done in workplaces, preferred by 71%. Sit-stand desk provision reduced workplace sitting time by 94 min/day (95% CI 17.7-170.7). Their impact on energy expenditure and cardio-metabolic outcomes is unclear. The results confirm the feasibility of a trial assessing sit-stand desks' impact on energy expenditure, sitting time and cardio-metabolic outcomes, which should reduce uncertainty concerning the intervention's potential to reduce the health risks of prolonged sitting. ISRCTN44827407.
关于升降桌对减少办公室工作人员久坐时间的总体效果仍存在不确定性。本研究评估了一项随机对照试验的可行性，该试验旨在研究工作场所升降桌对总体能量消耗、久坐时间和心血管代谢指标的影响。研究包括四个阶段：第一阶段：在线调查；第二阶段：工作空间审核；第三阶段：随机干预（在工作场所提供升降桌，为期3个月）；第四阶段：定性研究部分。参与者为英国剑桥两家公司的办公室员工。在第一阶段对试验感兴趣的参与者中，100人被随机分配到第二阶段。在那些工作空间适合安装升降桌的人中，20人被随机分配到第三阶段。被分配到干预组的参与者完成了第四阶段。研究结果包括：试验参与兴趣、办公桌类型（完整办公桌/桌面安装型）和评估地点（工作场所/实验室/家中）偏好（第一阶段）；允许安装升降桌的工作空间比例（第二阶段）；能量消耗、久坐时间和心血管代谢指标（第三阶段）；研究参与体验（第四阶段）。数据收集时间为2015年5月至2016年12月。招募和试验实施是可行的：92%的调查受访者表示有参与兴趣；80%的工作空间可以容纳升降桌；71%的人倾向于在工作场所进行评估。提供升降桌使工作场所的久坐时间每天减少了94分钟（95%置信区间17.7 - 170.7）。其对能量消耗和心血管代谢指标的影响尚不清楚。结果证实了一项评估升降桌对能量消耗、久坐时间和心血管代谢指标影响的试验的可行性，这将减少关于该干预措施降低久坐健康风险潜力的不确定性。国际标准随机对照试验编号：ISRCTN44827407。
