Validity and repeatability of the EPIC-Norfolk Physical Activity Questionnaire

Wareham, N.J., Jakes, R.W., Rennie, K.L., Mitchell, J., Hennings, S. and Day, N.E. (2002) Validity and repeatability of the EPIC-Norfolk Physical Activity Questionnaire. International Journal of Epidemiology (1). pp. 168-74. ISSN 0300-5771
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Physical activity is an important lifestyle which is often poorly assessed in epidemiological studies. The European Prospective Investigation into Cancer Study-Norfolk cohort (EPIC-Norfolk), a large population-based cohort study, has developed a comprehensive questionnaire to assess activity in different domains of life aimed at assessing total energy expenditure. We report the repeatability of this instrument and its validity against repeated objective measures of fitness and energy expenditure undertaken throughout the time frame of reference of the questionnaire.

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