title: Validation evidence for the Netherlands physical activity questionnaire for young children: the Iowa bone development study.
authors.affiliation: Department of Health and Sports Studies, The University of Iowa, IA 52242, USA. kathleen-janz@uiowa.edu
authors.forename: Kathleen F
authors.initials: KF
authors.lastname: Janz
authors.forename: Barbara
authors.initials: B
authors.lastname: Broffitt
authors.forename: Steven M
authors.initials: SM
authors.lastname: Levy
mesh_terms: D001846:Bone Development; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D016552:Ergometry / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008019:Life Style; D016015:Logistic Models; D008297:Male; D009043:Motor Activity; D016017:Odds Ratio; D015203:Reproducibility of Results; D012737:Sex Factors; D011795:Surveys and Questionnaires; D013690:Television