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目的检验儿童青少年体力活动量表的信度及效度,为儿童及青少年体力活动的流行病学调查提供测量工具。方法通过分层整群抽样,共抽取南京市两个区的6所学校852名学生作为研究对象。在7天的时间内,要求受试者在一周的每1天里填写体力日记,并在第8天填写量表。使用Cronbach’sα系数对量表的信度进行评价,通过分析量表测量的体力活动水平与体力活动日记所得到的半客观的体力活动量之间的Spearman相关系数和Bland-Altman图来评价量表的效度。结果有效调查816人,量表所测量的中等和高强度体力活动的Conranbach系数分别为0.722和0.731,表明该量表的信度较好。量表与体力活动日记的测量值之间的Spearman系数处于0.584~0.684之间(均有P<0.05)。Bland-Altman的一致性分析显示量表与体力活动日记对中等强度和高强度体力活动测量结果的一致性分别为95.44%和95.47%,具有较高的效度。结论儿童青少年体力活动量表的信效度良好,可用于儿童及青少年人群体力活动的流行病学研究。
Objective To test the reliability and validity of physical activity scale of children and adolescents and to provide a measuring tool for the epidemiological investigation of physical activity of children and adolescents. Methods By stratified cluster sampling, a total of 852 students from 6 schools in two districts of Nanjing were collected as research objects. Subjects were asked to fill out the physical diary every day of the week for seven days and to complete the scale on day eight. The Cronbach’s α coefficient was used to evaluate the reliability of the scale. The Spearman correlation coefficient and the Bland-Altman graph were used to evaluate the reliability of the scale by analyzing Spearman’s correlation coefficient and Bland-Altman graph between the level of physical activity measured by the scale and the semi-objective physical activity obtained from the diary of physical activity Validity of the table. Results 816 people were surveyed effectively. The Conranbach coefficients of medium and high intensity physical activity measured by the scale were 0.722 and 0.731, respectively, indicating that the reliability of the scale is good. Spearman coefficients between the scales and physical activity diaries were between 0.584 and 0.684 (all P <0.05). Bland-Altman’s consistency analysis showed that the consistency between scales and physical activity diaries for the measurement of moderate-intensity and high-intensity physical activity was 95.44% and 95.47%, respectively, with high validity. Conclusion The validity scale of children and adolescents physical activity scale is good, which can be used in the epidemiological study of physical activity of children and adolescents.