Murakami Haruka, Yoshimura Eiichi, Ishikawa-Takata Kazuko, Hasegawa Yuko, Kubota Tetsuya, Tsuboyama-Kasaoka Nobuyo, Nishi Nobuo, Yokoyama Yukari, Yaegashi Yumi, Sakata Kiyomi, Kobayashi Seiichiro, Miyachi Motohiko, Tokudome Shinkan
National Institute of Health and Nutrition.
Nihon Koshu Eisei Zasshi. 2013 Apr;60(4):222-30.
This study was performed to assess the validity and reproducibility of a questionnaire on physical activity status used for health surveying among victims of the Great East Japan Earthquake.
Seventy-four residents (21 men and 53 women) living in temporary housing in Kamaishi City, Iwate Prefecture, participated in this study. The physical activity status questionnaire was composed of 4 questions regarding the frequency of performing domestic and occupational physical activities, the frequency of leaving their residence, walking duration per day, and sedentary time. The physical activity level for 2 weeks was measured using a tri-accelerometer to validate the responses to the questionnaire. Test-retest reproducibility was examined at 2-week intervals.
The physical activity levels were 4,521 +/- 2,266 steps/day for men and 4,533 +/- 2,070 steps/day for women. There was a significant difference in step count between those responding differently to the 3 options in the questionnaire regarding average walking duration per day: those who reported walking for > or = 60 min, 30-60 min, or < or = 30 min had step counts of 5,343 +/- 1,757, 4,760 +/- 1,752, and 3,063 +/- 1,772 steps/day, respectively (P < 0.05). When the response options for 3 questions (excluding those for sedentary time) were given scores (a higher score for a higher physical activity level), there were significant correlations between question score and step count (r = 0.486, P < 0.05) and the amount of moderate to vigorous physical activity (r = 0.342, P < 0.05). The test-retest trial showed a moderate degree of reproducibility, with weighted K coefficients of 0.41-0.65.
Three questions on physical activity levels may allow assessment of an individual's physical activity level, with a moderate degree of reproducibility.
本研究旨在评估一份用于东日本大地震受害者健康调查的身体活动状况问卷的有效性和可重复性。
74名居住在岩手县釜石市临时住房中的居民（21名男性和53名女性）参与了本研究。身体活动状况问卷由4个问题组成，涉及家务和职业体力活动的频率、离开住所的频率、每天步行时间和久坐时间。使用三轴加速度计测量2周的身体活动水平，以验证问卷的回答。每隔2周检查一次重测可重复性。
男性的身体活动水平为4521±2266步/天，女性为4533±2070步/天。对于问卷中关于每天平均步行时间的3个选项回答不同的人，步数存在显著差异：报告步行≥60分钟、30 - 60分钟或≤30分钟的人，步数分别为5343±1757、4760±1752和3063±1772步/天（P<0.05）。当对3个问题（不包括久坐时间问题）的回答选项进行评分（身体活动水平越高得分越高）时，问题得分与步数（r = 0.486，P<0.05）以及中度至剧烈身体活动量（r = 0.342，P<0.05）之间存在显著相关性。重测试验显示出中等程度的可重复性，加权K系数为0.41 - 0.65。
关于身体活动水平的3个问题可能有助于评估个体的身体活动水平，具有中等程度的可重复性。
