Dalla Lana School of Public Health, Division of Epidemiology, University of Toronto, Toronto, Ontario, Canada
Dalla Lana School of Public Health, Division of Epidemiology, University of Toronto, Toronto, Ontario, Canada.
BMJ Open. 2024 Sep 20;14(9):e081583. doi: 10.1136/bmjopen-2023-081583.
To estimate the effect of (a) the COVID-19 pandemic and (b) COVID-19 restriction stringency on daily minutes of device-measured moderate-to-vigorous physical activity (MVPA).
Physical activity data were collected from the INTerventions, Equity, Research and Action in Cities Team (INTERACT) cohorts in Montreal, Saskatoon and Vancouver before (May 2018 to February 2019, 'phase 1') and during the pandemic (October 2020 to February 2021, 'phase 2'). We estimated the effect of the two exposures by comparing daily MVPA measured (a) before vs during the pandemic (phase 1 vs phase 2) and (b) at different levels of COVID-19 restriction stringency during phase 2. Separate mixed effects negative binomial regression models were used to estimate the association between each exposure and daily MVPA, with and without controlling for confounders. Analyses were conducted on person-days with at least 600 min of wear time. Effect modification by gender, age, income, employment status, education, children in the home and city was assessed via stratification.
Montreal (Quebec), Saskatoon (Saskatchewan) and Vancouver (British Columbia), Canada.
Daily minutes of MVPA, as measured using SenseDoc, a research-grade accelerometer device.
Daily minutes of MVPA were 21% lower in phase 2 (October 2020 to February 2021) compared with phase 1 (May 2018 to February 2019), controlling for gender, age, employment status, household income, education, city, weather and wear time (rate ratio=0.79, 95% CI 0.69, 0.92). This did not appear to be driven by changes in the sample or timing of data collection between phases. The results suggested effect modification by employment, household income and education. Restriction stringency was not associated with daily MVPA between October 2020 and February 2021 (adjusted rate ratio=0.99, 95% CI 0.96, 1.03).
Between October 2020 and February 2021, daily minutes of MVPA were significantly lower than 2 years prior, but were not associated with daily COVID-19 restriction stringency.
评估（a）COVID-19 大流行和（b）COVID-19 限制严格程度对设备测量的中等到剧烈身体活动（MVPA）的日常分钟数的影响。
在大流行之前（2018 年 5 月至 2019 年 2 月，第 1 阶段）和大流行期间（2020 年 10 月至 2021 年 2 月，第 2 阶段），从蒙特利尔、萨斯卡通和温哥华的干预、公平、研究和城市行动团队（INTERACT）队列中收集了体力活动数据。我们通过比较（a）大流行前后（第 1 阶段与第 2 阶段）和（b）第 2 阶段不同 COVID-19 限制严格程度下的日常 MVPA，来估计这两个暴露的影响。使用混合效应负二项回归模型分别估计每个暴露因素与日常 MVPA 的关联，同时控制和不控制混杂因素。对至少有 600 分钟佩戴时间的人日进行了分析。通过分层评估性别、年龄、收入、就业状况、教育、家中儿童和城市的效应修饰作用。
加拿大魁北克省蒙特利尔、萨斯喀彻温省萨斯卡通和不列颠哥伦比亚省温哥华。
使用 SenseDoc 测量的日常 MVPA 分钟数，这是一种研究级别的加速度计设备。
与第 1 阶段（2018 年 5 月至 2019 年 2 月）相比，第 2 阶段（2020 年 10 月至 2021 年 2 月）的日常 MVPA 减少了 21%，控制了性别、年龄、就业状况、家庭收入、教育、城市、天气和佩戴时间（比率比=0.79，95%CI 0.69，0.92）。这似乎不是由第 1 阶段和第 2 阶段之间样本或数据收集时间的变化所驱动。结果表明，就业、家庭收入和教育存在效应修饰作用。在 2020 年 10 月至 2021 年 2 月期间，限制严格程度与每日 MVPA 无关（调整后比率比=0.99，95%CI 0.96，1.03）。
在 2020 年 10 月至 2021 年 2 月期间，每日 MVPA 分钟数明显低于 2 年前，但与每日 COVID-19 限制严格程度无关。
