通过两个问题评估身体活动水平：用双标水进行验证
Assessment of the physical activity level with two questions: validation with doubly labeled water.
作者信息
Johansson G, Westerterp K R
机构信息
Department of Health Behaviours, The Swedish National Institute of Public Health, Ostersund, Sweden.
出版信息
Int J Obes (Lond). 2008 Jun;32(6):1031-3. doi: 10.1038/ijo.2008.42. Epub 2008 Apr 8.
OBJECTIVE
To validate a two-question questionnaire on physical activity with the doubly labeled water (DLW) method.
DESIGN
Cross-sectional study.
SUBJECTS
Nine volunteers, age 33-75 years, with a mean body mass index (BMI) (kg m(-2)) of 27.4.
MEASUREMENTS
A questionnaire with one question on physical activity at work and one question on physical activity during leisure time. The answers were converted into a PAL (physical activity level=energy expenditure/basal metabolic rate) value, which was validated with the DLW method.
RESULTS
The mean values (s.d.) of PAL for the questionnaire and DLW measurements were 1.7 (0.1) and 1.7 (0.1), respectively, with a mean difference of 0.004 (0.172).
CONCLUSIONS
The results were promising to the extent that they could be used in large-scale epidemiological studies.
目的
用双标水（DLW）法验证一份关于身体活动的两问题问卷。
设计
横断面研究。
研究对象
9名志愿者，年龄33 - 75岁，平均体重指数（BMI）（kg/m²）为27.4。
测量方法
一份问卷，一个问题关于工作中的身体活动，另一个问题关于休闲时间的身体活动。答案被转换为体力活动水平（PAL = 能量消耗/基础代谢率）值，并用DLW法进行验证。
结果
问卷和DLW测量的PAL平均值（标准差）分别为1.7（0.1）和1.7（0.1），平均差值为0.004（0.172）。
结论
这些结果很有前景，可用于大规模流行病学研究。
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