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Design and Evaluation of a Computer-Based 24-Hour Physical Activity Recall (cpar24) Instrument

Kohler, Simone ; Behrens, Gundula ; Olden, Matthias ; Baumeister, Sebastian E ; Horsch, Alexander ; Fischer, Beate ; Leitzmann, Michael F


Background: Widespread access to the Internet and an increasing number of Internet users offers the opportunity of using Web-based recalls to collect detailed physical activity data in epidemiologic studies. Objective: The aim of this investigation was to evaluate the validity and reliability of a computer-based 24-hour physical activity recall (cpar24) instrument with respect to the ...


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