The validity of single-item, self-assessment questions as measures of adult physical activity.

Abstract:

:Individual energy expenditure (kcal/kg/day) was calculated from a detailed set of questions from the Health Promotion and Disease Prevention Supplement of the 1985 National Health Interview Survey. Responses to three single-item, self-assessment questions were compared to the energy expenditure variable to test criterion validity. Spearman's correlation coefficient revealed moderate correlations between energy expenditure and corresponding levels of self-assessed leisure-time physical activity for each single-item question (r = 0.14 to 0.41). For purposes of measuring prevalence of physical activity, the energy expenditure variable was used to categorize individuals into activity levels. The single-item questions were found to have Spearman's correlations with the categorical measures ranging from 0.11 to 0.37 for leisure-time activities. Generally higher correlations were found for males and younger age groups (18-34 years). The relationships were interpreted as being weak relative to an expected correlation of 0.75 for criterion validation. However, the single-item questions show promise for obtaining proxy estimates of the degree of leisure-time physical activity in a population.

journal_name

J Clin Epidemiol

authors

Weiss TW,Slater CH,Green LW,Kennedy VC,Albright DL,Wun CC

doi

10.1016/0895-4356(90)90013-f

subject

Has Abstract

pub_date

1990-01-01 00:00:00

pages

1123-9

issue

11

eissn

0895-4356

issn

1878-5921

pii

0895-4356(90)90013-F

journal_volume

43

pub_type

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