Objective To examine the overall effectiveness of interventions for reducing adult sedentary behaviour and to directly compare environmental, behavioural and multicomponent interventions. Design Intervention systematic review with meta-analysis. Data sources Ovid PsycINFO, Ovid MEDLINE, EBSCOHost CINAHL, EBSCOHost SPORTDiscus and PubMed were searched from inception to 26 July 2017. Eligibility criteria Trials including randomised controlled trials, quasi-randomised, cluster-randomised, parallel group, prepost, factorial and crossover trials where the primary aim was to change the sedentary behaviour of healthy adults assessed by self-report (eg, questionnaires, logs) or objective measures (eg, accelerometry). Results Thirty-eight trials of 5983 participants published between 2003 and 2017 were included in the qualitative synthesis; 35 studies were included in the quantitative analysis (meta-analysis). The pooled effect was a significant reduction in daily sitting time of −30.37 min/day (95% CI −40.86 to −19.89) favouring the intervention group. Reductions in sitting time were similar between workplace (−29.96 min/day; 95% CI −44.05 to –15.87) and other settings (−30.47 min/day; 95% CI −44.68 to –16.26), which included community, domestic and recreational environments. Environmental interventions had the largest reduction in daily sitting time (−40.59 min/day; 95% CI −61.65 to –19.53), followed by multicomponent (−35.53 min/day; 95% CI −57.27 to –13.79) and behavioural (−23.87 min/day; 95% CI −37.24 to –10.49) interventions. Conclusion Interventions targeting adult sedentary behaviour reduced daily sitting time by an average of 30 min/day, which was likely clinically meaningful.

中文翻译：

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减少成人久坐时间的环境、行为和多因素干预：系统评价和荟萃分析

目的 检验减少成人久坐行为的干预措施的总体有效性，并直接比较环境、行为和多因素干预措施。设计干预系统回顾与荟萃分析。数据来源 Ovid PsycINFO、Ovid MEDLINE、EBSCOHost CINAHL、EBSCOHost SPORTDiscus 和 PubMed 从开始到 2017 年 7 月 26 日进行了检索。 资格标准主要目的是改变通过自我报告（例如问卷、日志）或客观测量（例如加速度计）评估的健康成年人的久坐行为。结果 2003 年至 2017 年间发表的 5983 名参与者的 38 项试验被纳入定性综合；定量分析（荟萃分析）纳入了 35 项研究。综合效果是干预组的每日坐姿时间显着减少 -30.37 分钟/天（95% CI -40.86 至 -19.89）。工作场所（-29.96 分钟/天；95% CI -44.05 至 –15.87）和其他环境（-30.47 分钟/天；95% CI -44.68 至 –16.26）之间的就坐时间减少相似，其中包括社区、家庭和娱乐环境。环境干预对每日坐姿时间的减少幅度最大（-40.59 分钟/天；95% CI -61.65 至 –19.53），其次是多组分（-35.53 分钟/天；95% CI -57.27 至 –13.79）和行为（- 23.87 分钟/天；95% CI -37.24 至 –10.49) 干预。结论 针对成人久坐行为的干预措施将每天的坐姿时间平均减少了 30 分钟/天，