Demonstrates satisfactory ranking of subjects in the EPIC study using a short questionnaire, implying its validity.
The questions selected for the short questionnaire are not suitable for estimating energy expenditure at an absolute level. Reproducibility and relative validity of the ranking of subjects seemed satisfactory and comparable to the extensive questionnaire. The results imply that the short questionnaire is suitable for ranking subjects in the EPIC study.
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Margreet Pols (1997) studied this question.
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