Mary Nicolaou|Maaike G.J. Gademan|Marieke B. Snijder|Raoul Engelbert|Henriëtte Dijkshoorn|Caroline B. Terwee|Karien Stronks
Validation of the SQUASH Physical Activity Questionnaire in a Multi-Ethnic Population: The HELIUS Study
University of Amsterdam|University of Amsterdam|University of Amsterdam|Amsterdam University of Applied Sciences|Academic Medical Center|Public Health Service of Amsterdam|EMGO Institute for Health and Care Research|University of Amsterdam
purpose investigate reliability validity squash physical activity pa questionnaire multiethnic population living netherlands methods included participants helius study populationbased cohort study study included dutch n 114 turkish n 88 moroccan n 74 southasian surinamese n 98 african surinamese n 91 adults aged 1870 years squash selfadministered twice assess testretest reliability mean interval 67 weeks participants wore accelerometer heart rate monitor actiheart enable assessment construct validity results observed low testretest reliability intra class correlation coefficients ranged low 005 moderatehigh intensity pa african surinamese women acceptable 078 light intensity pa moroccan women discrepancy selfreported measured pa differed basis intensity activity selfreported light intensity pa lower measured selfreported moderatehigh intensity pa higher measured wide limits agreement discrepancy questionnaire actiheart measures moderate intensity pa differ ethnic minority dutch participants correction relevant confounders additionally squash overestimated number participants meeting dutch pa norm cohens kappas agreement poor highest 030 dutch women conclusion found considerable variation testretest reliability validity selfreported pa consistency based ethnic origin findings imply squash provide valid basis comparison pa ethnic groups