目的 探讨儿童24 h活动行为与健康相关生活质量(HRQoL)之间的横向和纵向联系，并采用等时替代分析方法反映不同活动行为时间重新分配后对HRQoL得分的影响，为促进儿童健康提供科学依据。方法 2022年5月，采用整群随机抽样与方便抽样相结合的方法抽取重庆市万州区3所小学397名7～10岁儿童，使用加速度计监测儿童1周的活动行为，并通过儿童健康相关生活质量问卷测试儿童HRQoL;1年后(2023年5月)使用相同问卷随访调查儿童HRQoL。采用成分多元线性回归模型分析儿童24 h活动行为与HRQoL之间的关系。结果 儿童低强度体力活动(LPA)、中高强度体力活动(MVPA)、睡眠(SP)和久坐行为(SB)时间分别为(331。5±41。7，61。9±28。6，561。7±78。4，484。9±67。3)min/d。儿童基线HRQoL总分均值为(69。5±6。6)分，1年后为(67。6±5。1)分。MVPA和SP与基线(β值分别为0。59，0。38)和1年后(β值分别为0。48，0。39)的HRQoL总分均呈正相关，SB与基线和1年后的HRQoL总分均呈负相关(β值分别为-0。25，-0。53)(P值均＜0。05)。等时替代分析显示，以30 min MVPA替代LPA或SB，基线HRQoL总分分别提高1。81，2。79分，1年后HRQoL总分分别提高1。37，2。12分;以SP替代SB，基线与1年后的HRQoL总分分别提高0。61和0。39分(P值均＜0。05)。结论 儿童的24 h活动行为，特别是体力活动(PA)和SP与儿童HRQoL密切相关。适当采取措施增加儿童PA和SP时间、减少SB时间，可以改善儿童的HRQoL。
Tracking analysis of the relationship between isotemporal substitution of 24 h movement behavior and quality of life in children
Objective To explore the cross-sectional and longitudinal relationships between children's 24 h movement behaviors and health-related quality of life(HRQoL),and to reflect the impact of reallocating time between different activities on HRQoL scores using the isotemporal substitution analysis method,so as to provide a scientific basis for promoting children's health.Meth-ods In May 2022,a method combining cluster random sampling and convenience sampling was employed to conduct baseline sur-vey on 397 children aged 7-10 from three primary schools in Wanzhou District of Chongqing.Children's movement behaviors were monitored using accelerometers,and their HRQoL was assessed through a health-related quality of life questionnaire for children.The same questionnaire was used for assessing HRQoL of children on the follow-up survery after on year(May 2023).A component-based multiple linear regression model was used to analyze the relationship between children's 24 h movement behaviors and HRQoL.Results The average daily times for children's light physical activity(LPA),moderate-to-vigorous physical activity(MV-PA),sleep(SP),and sedentary behavior(SB)were(331.5±41.7,61.9±28.6,561.7±78.4,484.9±67.3)min,respectively.The mean baseline HRQoL score was(69.5±6.6),and it was(67.6±5.1)after one year.MVPA and SP were positively correlated with HRQoL at baseline(β=0.59,0.38)and after one year(β=0.48,0.39),while SB was negatively correlated with HRQoL at baseline and after one year(P=-0.25,-0.53)(P＜0.05).An isotemporal substitution analysis showed that replacing 30 minutes of LPA or SB with MVPA increased the HRQoL scores by 1.81 and 2.79 at baseline,and by 1.37 and 2.12 after one year.Additionally,repla-cing SB with SP increased the HRQoL scores by 0.61 at baseline and by 0.39 after one year(P＜0.05).Conclusions Children's 24 h movement behaviors,particularly physical activity(PA)and sleep,are closely related to children's HRQoL.Appropriate measures should be taken to increase children's PA and SP time and reduce SB time to improve children's HRQoL.
Motor activityIsotemporal substitutionQuality of lifeRegression analysisChild
NETL
NSTL
万方数据
