非裔美国女孩中用于全球环境监测系统的活动测量方法的有效性和可靠性。

Validity and reliability of activity measures in African-American girls for GEMS.

作者信息

Treuth Margarita S, Sherwood Nanacy E, Butte Nancy F, McClanahan Barbara, Obarzanek Eva, Zhou Ainong, Ayers Candace, Adolph Anne, Jordan Joel, Jacobs David R, Rochon James

机构信息

Center for Human Nutrition, Johns Hopkins University, Baltimore, MD 21205, USA.

出版信息

Med Sci Sports Exerc. 2003 Mar;35(3):532-9. doi: 10.1249/01.MSS.0000053702.03884.3F.

DOI:10.1249/01.MSS.0000053702.03884.3F

PMID:12618587

Abstract

PURPOSE

To determine the reliability and validity of physical activity monitors and self-report instruments suitable for young African-American girls.

METHODS

A validation study was conducted by the Girls health Enrichment Multi-site Studies (GEMS) research team to compare an accelerometer with a pedometer and two self-report instruments for assessing physical activity in African-American girls, age 8-9 yr. Girls (N= 68) attended two clinic visits spaced 4 d apart. Each girl wore a MTI/CSA accelerometer (used as the criterion standard for validity) and a pedometer simultaneously for four consecutive days. Girls completed on two occasions a 24-h physical activity checklist of yesterday and usual activities, including sedentary activities (GEMS Activity Questionnaire, GAQ), and a 3-d computerized self-report instrument (Activitygram).

RESULTS

Girls were (mean +/- SD) 9.0 +/- 0.6 yr old and had a body mass index of 19.4 kg x m. Reliability measured by intraclass correlations (ICC) and Pearson correlation coefficients (r) were calculated for the MTI/CSA (ICC = 0.37, P< 0.0001), pedometer (ICC = 0.08, = 0.094), Activitygram (ICC = 0.24) (P = 0.005), and GAQ for physical (r = 0.80, P< 0.0001) and sedentary (r = 0.3-0.5, P< 0.005) activities. Significant Pearson correlations between the MTI/CSA and the other instruments, as a measure of validity, were observed for the 4-d average pedometer score (r = 0.47, P< 0.0001), 3-d average Activitygram score (r = 0.37, P= 0.002), and the average of the two yesterday and two usual GAQ activity scores for a subset of 18 physical activities questions (r = 0.27, = 0.03; and r = 0.29,P = 0.02, respectively). The MTI/CSA was uncorrelated with single day scores from the three other instruments.

CONCLUSION

The reliability of the instruments tested was acceptable, except the pedometer. Validity correlations were significant when more than one day was used. Self-report instruments need further development for improved reliability and validity.

摘要

目的

确定适用于非洲裔美国年轻女孩的身体活动监测器和自我报告工具的可靠性和有效性。

方法

女孩健康强化多地点研究（GEMS）研究团队进行了一项验证研究，以比较加速度计与计步器以及两种自我报告工具，用于评估8至9岁非洲裔美国女孩的身体活动。女孩（N = 68）进行了两次间隔4天的门诊就诊。每个女孩连续四天同时佩戴一个MTI/CSA加速度计（用作有效性的标准）和一个计步器。女孩两次完成了一份关于昨天和日常活动的24小时身体活动清单，包括久坐活动（GEMS活动问卷，GAQ），以及一份为期3天的计算机化自我报告工具（活动图）。

结果

女孩的平均年龄为（均值±标准差）9.0±0.6岁，体重指数为19.4 kg/m²。通过组内相关系数（ICC）和Pearson相关系数（r）测量的可靠性分别计算如下：MTI/CSA（ICC = 0.37，P < 0.0001），计步器（ICC = 0.08，r = 0.094），活动图（ICC = 0.24）（P = 0.005），以及GAQ中身体活动（r = 0.80，P < 0.0001）和久坐活动（r = 0.3 - 0.5，P < 0.005）的可靠性。作为有效性的衡量指标，观察到MTI/CSA与其他工具之间的显著Pearson相关性，计步器4天平均得分（r = 0.47，P < 0.0001），活动图3天平均得分（r = 0.37，P = 0.002），以及18项身体活动问题子集中昨天和两天日常GAQ活动得分的平均值（分别为r = 0.27，P = 0.03；以及r = 0.29，P = 0.02）。MTI/CSA与其他三种工具的单日得分不相关。