身體活動自我報告量表之效度及信度的研究－－以TriTrac-R3D三度空間加速器為效標

A study on validity and reliability of self-report measures of physical activity-- Using TriTrac-R3D accelerometer as criterion

本研究以國內大學女生73名經簽署同意書之自願者為對象，旨在探討兩種問卷測量工具（身體活動七日回憶法問卷(7-d PAR)、三日記錄法日誌(3-d PAL))之信度與效度。受測者於研究期間佩帶三度空間加速器(riTrac-R3D accelerometer)，連續監測八天（七個完整日），以瞭解其身體活動之變化狀況，並以此為效標(criterion)，探討7-d PAR 及3-d PAL之效度。研究結果顯示7-d PAR之效度為Spearman's rho=.86 (P< .001 )，3-d PAL之效度為Spearman's rho=.81(P< .001)。7-d PAR之兩週後再測信度為Spearman's rho=.97 (P< .001 )，3-d PAL之兩週後再測信度為Spearman's rho=.95(P< .001)。綜合前著「身體活動自我報告量表之效度及信度的研究－－以Polar Vantage NV心搏率監測器為效標」之研究結果，證實7-d PAR與3-d PAL均具有良好之信度與效度，此兩種量表均可用於大規模之社區調查及流行病學研究，作為組織或群體身體活動量之估計。惟，就施測之便利性言之，以3-d PAL較為便利與節省時間。

The purpose of this study was to examine the reliability and validity of the 7-d interview-administered physical activity recall (7-d PAR) and 3-d physical activity log (3-d PAL). 73 female college students were recruited to participate this study by signing informed consent agreement. TriTrac-R3D accelerometer was used as criterion and 2-weeks later test-retest reliability also were examined. The results revealed that the validity of 7-d PAR was Spearman's rho= .86 (p< .001) whereas the 3-d PAL was .81 (p< .001). With regard to test-retest reliability, 7-d PAR was Spearman's rho = .97 (p< .001) whereas the 3-d PAL was .91 (p< .001). The data of estimation for physical activity by 7-d PAR seem to be underestimated, but the further study is needed, whereas 3-d PAL significantly overestimated compared by TriTrac-R3D. Nevertheless, 3-d PAL is low-cost and feasible for large population community-based social survey or epidemiology research.