Slater C H, Green L W, Vernon S W, Keith V M
Prev Med. 1987 Jan;16(1):107-18. doi: 10.1016/0091-7435(87)90010-7.
Health policy in the United States has paid scant notice to physical activity until recently. This current policy focus on physical activity has revealed not only that there is less than adequate data about it but also that the single survey questions used for the purpose of measuring its prevalence should be interpreted carefully. A case in point is the example presented in this article, which gives estimates of physical activity prevalence levels for women of child-bearing ages from several National Center for Health Statistics (NCHS) surveys. The amount of physical activity reported, and thus the proportion of women at risk for various diseases due to limited activity, depends on how the question is asked and the type of responses offered as options. Various questions used in three different NCHS surveys produced prevalence estimates of limited physical activity levels ranging from 3.9 to 39.1%. These findings have important implications for survey assessments of physical activity at all policy levels.
直到最近，美国的卫生政策才开始关注身体活动。当前对身体活动的政策关注不仅揭示了有关身体活动的数据不足，还表明用于衡量其流行程度的单一调查问题应谨慎解读。本文给出的例子就是一个恰当的例证，它给出了来自美国国家卫生统计中心（NCHS）多项调查的育龄女性身体活动流行水平估计值。报告的身体活动量，以及因此因活动受限而面临各种疾病风险的女性比例，取决于问题的提问方式以及提供的选项类型。NCHS三项不同调查中使用的各种问题得出的身体活动水平有限的流行率估计值在3.9%至39.1%之间。这些发现对所有政策层面的身体活动调查评估都具有重要意义。
