与作息安排相结合的青少年3日体力活动记录工具效度研究

采用体力活动客观测量工具加速度计作为效标,研制适合中国青少年的三日体力活动记录工具,并进行信效度研究,为有效调查中国青少年体力活动提供参考.方法 抽取北京市某校初高中148名12~17岁青少年(男生70名,女生78名).记录工具与ActiGraph GT3X+加速度计一同发放,1周后统一回收加速度计和记录工具.再次发放记录工具填写进行信度检验.通过分析记录工具和加速度计体力活动水平的Spearman相关系数和Bland-Altman图来评价效度,通过组内相关系数评价信度.结果 记录工具结果同加速度计测量值之间的Spearman系数处于0.246~0.557之间(P<0.05).Bland-Altman的一致性分析显示中强度、高强度、中高强度体力活动结果的一致性分别为94.59%,95.27%,93.24%,具有较高的效度.2次测量的平均每天代谢当量总分的组内相关系数系数均大于0.7,表明该记录工具的信度较好.结论 3d体力活动记录工具具有较好的可靠性和有效性,可用于青少年的日常体力活动大样本调查.

Validity of three-day physical activity recording tools among adolescents with arranged schedule

Objective To develop a three-day physical activity recording tools suitable for young people in China by using accelerometer as the gold standard.Methods This study was conducted among 148 high school adolescents aged 12-17 years (70boys and 78 girls) in Beijing.All the adolescents were provided with the recording tool together with the ActiGraph GT3X + Accelerometer and returned it back a week later.Re-issue the recording tool to fill in the reliability test.Spearman correlation and the Bland-Altman graph was used to evaluate the association between the recording instrument and accelerometer.Retest reliability was evaluated by intra-class correlation coefficient.Results Spearman coefficient between the recording tool and the accelerometer was 0.246-0.557(P<0.05).Brian-Altman's consistent analysis showed that the consistency of MPA,VPA and MVPA results was 94.59%,95.27% and 93.24%,respectively,showing high validity.The intra-class correlation coefficients of the average daily metabolic equivalents (METS) between the two measurements were higher than 0.7,indicating good reliability of our recording tool.Conclusion The three-day physical activity recording tool developed in this study has good reliability and validity,and can be used to investigate the large-scale physical activity of adolescents.