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

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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.

References (20)

  • C. Slater et al.

    Problems in estimating the prevalence of physical activity from national surveys

    Prev Med

    (1987)
  • P. Wilson et al.
  • U.S. Department of Health Education and Welfare

    Healthy People: The Surgeon General's Report on Health Promotion and Disease Prevention

  • U.S. Dept of Health and Human Services

    Promoting Health/Preventing Disease: Objectives for the Nation

    (1980)
  • C. Caspersen et al.

    Physical activity, exercise and physical fitness: definitions and distinctions for health-related research

    Public Health Rep

    (1985)
  • C. Caspersen et al.

    Status of the 1990 physical fitness and exercise objectives-evidence from NHIS 1985

    Public Health Rep

    (1986)
  • L. Green et al.

    Data requirements to measure progress on the objectives for the nation in health promotion and disease prevention

    Am J Public Health

    (1983)
  • R. LaPorte et al.

    Assessment of physical activity in epidemiologic research: problems and prospects

    Public Health Rep

    (1985)
  • K. Powell et al.

    The status of the 1990 objectives for physical fitness and exercise

    Public Health Rep

    (1986)
  • K. Powell et al.
There are more references available in the full text version of this article.

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