caa a22 4500 38805915X CHVBK 20180307125115.0 cr unu---uuuuu 161130e199812 xx s 000 0 eng 10.1079/PHN19980043 doi S1368980098000445 pii (NATIONALLICENCE)cambridge-10.1079/PHN19980043 The validation of physical activity instruments for measuring energy expenditure: problems and pitfalls [Elektronische Daten] Abstract Objective: To review and categorize the problems associated with undertaking physical activity validation studies and to construct a checklist against which any study could be compared. Results: The studies reviewed demonstrated problems in defining the dimension of physical activity that is of interest and in the selection of an appropriate comparison technique. Ideally this should be closely related to the true exposure of interest and assess that exposure objectively and without correlated error from the study instrument in question. In many studies inappropriate comparison methods have been chosen which do not measure the true underlying exposure and which are likely to have correlated error. The choice of study populations, the frame of reference of the exposure measurement and the use of appropriate statistical methods are also problematic areas. Conclusions: There is no ideal measurement instrument or validation study design that is suitable for all situations. However, the checklist in this paper provides a means whereby the appropriateness of studies already undertaken or at the planning stage can be assessed. Copyright © The Nutrition Society 1998 Physical activity nationallicence Validation nationallicence Questionnaire nationallicence Energy expenditure nationallicence Rennie Kirsten L. Department of Community Medicine, Institute of Public Health, University of Cambridge, Cambridge CB2 2SR, UK Wareham Nicholas J. Department of Community Medicine, Institute of Public Health, University of Cambridge, Cambridge CB2 2SR, UK Public Health Nutrition Cambridge University Press 1/4(1998-12), 265-271 1368-9800 1:4<265 1998 1 PHN https://doi.org/10.1079/PHN19980043 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1079/PHN19980043 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rennie Kirsten L. Department of Community Medicine, Institute of Public Health, University of Cambridge, Cambridge CB2 2SR, UK NATIONALLICENCE 700 1- Wareham Nicholas J. Department of Community Medicine, Institute of Public Health, University of Cambridge, Cambridge CB2 2SR, UK NATIONALLICENCE 773 0- Public Health Nutrition Cambridge University Press 1/4(1998-12), 265-271 1368-9800 1:4<265 1998 1 PHN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge