title: Comparing the validity of 2 physical activity questionnaire formats in African-American and Hispanic women.
abstract: BACKGROUND
  The purpose of this study was to compare the validity of 2 physical activity questionnaire formats--one that lists activities (Checklist questionnaire) and one that assesses overall activities (Global questionnaire) by domain.
  
  
  METHODS
  Two questionnaire formats were validated among 260 African-American and Hispanic women (age 40-70) using 3 validation standards: 1) accelerometers to validate activities of ambulation; 2) diaries to validate physical activity domains (occupation, household, exercise, yard, family, volunteer/church work, and transportation); and 3) doubly-labeled water to validate physical activity energy expenditure (DLW-PAEE).
  
  
  RESULTS
  The proportion of total variance explained by the Checklist questionnaire was 38.4% with diaries, 9.0% with accelerometers, and 6.4% with DLW-PAEE. The Global questionnaire explained 17.6% of the total variance with diaries and about 5% with both accelerometers and with DLWPAEE. Overall, associations with the 3 validation standards were slightly better with the Checklist questionnaire. However, agreement with DLW-PAEE was poor with both formats and the Checklist format resulted in greater overestimation. Validity results also indicated the Checklist format was better suited to recall household, family, and transportation activities.
  
  
  CONCLUSIONS
  Overall, the Checklist format had slightly better measurement properties than the Global format. Both questionnaire formats are better suited to rank individuals.
authors.affiliation: Dept of Pediatrics, School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada.
authors.forename: Louise C
authors.initials: LC
authors.lastname: Mâsse
authors.forename: Janet E
authors.initials: JE
authors.lastname: Fulton
authors.forename: Kathleen B
authors.initials: KB
authors.lastname: Watson
authors.forename: Susan
authors.initials: S
authors.lastname: Tortolero
authors.forename: Harold W
authors.initials: HW
authors.lastname: Kohl
authors.forename: Michael C
authors.initials: MC
authors.lastname: Meyers
authors.forename: Steven N
authors.initials: SN
authors.lastname: Blair
authors.forename: William W
authors.initials: WW
authors.lastname: Wong
mesh_terms: D000054:Acceleration; D056044:Actigraphy; D000328:Adult; D001741:Black or African American / Q000706:statistics & numerical data*; D000368:Aged; D004734:Energy Metabolism; D005260:Female; D006630:Hispanic or Latino / Q000706:statistics & numerical data*; D006801:Humans; D008499:Medical Records; D008875:Middle Aged; D009043:Motor Activity; D015203:Reproducibility of Results; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D014481:United States; D016387:Women's Health / Q000706:statistics & numerical data*