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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국체육측정평가학회 한국체육측정평가학회지 한국체육측정평가학회지 제10권 제2호
발행연도
2008.12
수록면
31 - 42 (12page)

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초록· 키워드

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Background: Self-reported physical activity is widely used in clinical and research settings. Self-reports are subject to measurement error due to recall difficulty, different interpretations of terms like "moderate intensity" or "leisure time" and possible social desirability bias. Methods: Self-report and objectively measured physical activity data were compared in 3087 adult (ages 20 y or older) participants of the nationally representative US National Health and Nutrition Examination Survey (NHANES) 2003-2004. Participants answered a physical activity questionnaire and wore an accelerometer for four to seven days. Questions addressed activity from transportation; household tasks; and recreational or leisure time exercise, sports, or physically active hobbies and were translated to minutes per day of moderate or greater intensity (mod-vig) activity. Accelerometer data were converted to minutes of mod-vig activity by summing minutes where the accelerometer count exceeded 2020 counts for "modified ten-minute bouts", which allowed for interruptions of one or two minutes below threshold. Data were averaged over the available four to seven days. Results: Between 37.5% (men, 20-59 y) and 73.3% (women, 60+y) of the population had no bouts of activity measured by accelerometer, but only 10.1% (men, 20-59 y) to 25.3% (women, 60+y) reported zero minutes per day. Among the groups with zero accelerometer-measured activity bouts, the reported time in mod-vig activity ranged from 43.1 to 65.2 minutes per day. Cross categorization of accelerometer and self-report quantities found agreement for only 18.3% (men, 20-59 y) to 32.7% (women, 60+y) of the population. Individuals with zero accelerometer-measured activity appeared in considerable numbers across all quantiles of self-reported activity, suggesting that misclassification could be severe. Conclusion: Self-reports provide poor estimates of absolute amounts of physical activity and may also lead to serious misclassification. Researchers and health professionals should be cautious when interpreting self-reported physical activity.

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UCI(KEPA) : I410-ECN-0101-2019-692-000991185