title: Validity and reliability in a Flemish population of the WHO-MONICA Optional Study of Physical Activity Questionnaire.
abstract: OBJECTIVE
  This study assessed the validity and reliability of a self-administered physical activity questionnaire used in the WHO-MONICA project.
  
  
  METHODS
  Subjects (N = 167) were physical education and physical therapy alumni. The questionnaire (MOSPA-Q) covers a 1-yr period and measures the average weekly time and energy expenditure spent in one's occupation, transport-related activities, household chores, and leisure time activities. Test-retest reliability was reported as the intra-class correlation between calculated time or energy expenditure in different questionnaire items determined from two MOSPA-Q administrations. Validity was assessed using biometrical and physiological parameters as criterion measures.
  
  
  RESULTS
  Test-retest reliability ranged from 0.45 to 0.92 with the highest correlation coefficients obtained for the leisure time physical activities. The correlation between calculated daily total energy expenditure (TEE, Kcal.d-1) and lean body mass was 0.53 (P < 0.001). The correlation between energy expenditure in leisure time activities (Kcal.wk-1) and VO2peak was 0.44.
  
  
  CONCLUSIONS
  The MOSPA-Q provides a relatively valid and reliable estimate of physical activity.
authors.affiliation: Department of Human Physiology, Vrije Universiteit Brussel, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Roeykens
authors.forename: R
authors.initials: R
authors.lastname: Rogers
authors.forename: R
authors.initials: R
authors.lastname: Meeusen
authors.forename: L
authors.initials: L
authors.lastname: Magnus
authors.forename: J
authors.initials: J
authors.lastname: Borms
authors.forename: K
authors.initials: K
authors.lastname: de Meirleir
mesh_terms: D000328:Adult; D001530:Belgium; D001699:Biometry; D004812:Epidemiologic Methods; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D005082:Physical Exertion; D015203:Reproducibility of Results; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D014944:World Health Organization