Department of Public Health Sciences, Queen's University, Kingston, ON, K7L 3N6, Canada.
School of Kinesiology and Health Studies, Queen's University, Kingston, ON, K7L 3N6, Canada.
Int J Behav Nutr Phys Act. 2021 Feb 6;18(1):25. doi: 10.1186/s12966-021-01092-0.
Daily time spent in sleep, sedentary behaviour (SED), light intensity physical activity (LIPA), and moderate-to-vigorous intensity physical activity (MVPA) are compositional, co-dependent variables. The objectives of this study were to use compositional data analysis to: (1) examine the relationship between the movement behaviour composition (daily time spent in sleep, SED, LIPA and MVPA) and all-cause mortality risk, and (2) estimate the extent to which changing time spent in any given movement behaviour (sleep, SED, LIPA, or MVPA) within the movement behaviour composition was associated with changes in risk of all-cause mortality.
2838 adult participants from the 2005-2006 cycle of the U.S. National Health and Nutrition Examination Survey were studied using a prospective cohort design. Daily time spent in SED, LIPA and MVPA were determined by accelerometer. Nightly time spent sleeping was self-reported. Survey data were linked with mortality data through to the end of December 2015. Compositional data analysis was used to investigate relationships between the movement behaviour composition and mortality.
The movement behaviour composition was significantly associated with mortality risk. Time spent in MVPA relative to other movement behaviours was negatively associated with mortality risk (HR = .74; 95% CI [.67, .83]) while relative time spent in SED was positively associated with mortality risk (HR = 1.75; 95% CI [1.10, 2.79]). Time displacement estimates revealed that the greatest estimated changes in mortality risk occurred when time spent in MVPA was decreased and replaced with sleep, SED, LIPA or a combination of these behaviours (HRs of 1.76 to 1.80 for 15 min/day displacements).
The daily movement behaviour composition was related to mortality. Replacing time in MVPA or SED with equivalent time from any other movement behaviour was associated with an increase and decrease in mortality risk, respectively.
睡眠、久坐行为（SED）、低强度体力活动（LIPA）和中高强度体力活动（MVPA）的每日时间分配是组成性的、相互依赖的变量。本研究的目的是使用成分数据分析：（1）研究运动行为成分（睡眠、SED、LIPA 和 MVPA 的每日时间分配）与全因死亡率风险之间的关系，以及（2）估计在运动行为成分中改变任何特定运动行为（睡眠、SED、LIPA 或 MVPA）的时间分配与全因死亡率风险变化的程度。
采用前瞻性队列设计，对 2005-2006 年美国国家健康和营养调查的 2838 名成年参与者进行研究。SED、LIPA 和 MVPA 的每日时间分配由加速度计确定。每晚的睡眠时间由自我报告确定。通过调查数据与截至 2015 年 12 月底的死亡率数据相关联。使用成分数据分析来研究运动行为成分与死亡率之间的关系。
运动行为成分与死亡率风险显著相关。与其他运动行为相比，MVPA 的时间分配与死亡率风险呈负相关（HR=0.74；95%CI [0.67，0.83]），而 SED 的时间分配与死亡率风险呈正相关（HR=1.75；95%CI [1.10，2.79]）。时间置换估计表明，当 MVPA 的时间减少并被睡眠、SED、LIPA 或这些行为的组合替代时，死亡率风险的估计变化最大（HRs 为 1.76 至 1.80，置换时间为 15 分钟/天）。
每日运动行为成分与死亡率相关。用任何其他运动行为替代 MVPA 或 SED 的时间，分别与死亡率风险的增加和减少相关。
