title: Validation of the WHI brief physical activity questionnaire among women diagnosed with breast cancer.
abstract: OBJECTIVE
  To investigate the psychometric properties of the physical activity (PA) measure of the Women's Health Initiative (WHI).
  
  
  METHODS
  Women diagnosed with breast cancer and enrolled in the Women's Healthy Eating and Living Study (average age 55 years) wore an accelerometer for 1 week and completed the 7-day Physical Activity Recall (PAR) and brief WHI measure.
  
  
  RESULTS
  Both self-reports correlated 0.73 with the accelerometer and had 100% sensitivity for meeting the current PA guideline, but specificity was significantly higher for the PAR.
  
  
  CONCLUSIONS
  The WHI measure had comparable validity, sensitivity, and measurement bias compared to the widely accepted PAR.
authors.affiliation: San Diego State University Research Foundation, San Diego, CA, USA.
authors.forename: Marilyn
authors.initials: M
authors.lastname: Johnson-Kozlow
authors.forename: Cheryl L
authors.initials: CL
authors.lastname: Rock
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Gilpin
authors.forename: Kathryn A
authors.initials: KA
authors.lastname: Hollenbach
authors.forename: John P
authors.initials: JP
authors.lastname: Pierce
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms; D002140:California; D015444:Exercise; D005260:Female; D006801:Humans; D011939:Mental Recall; D008875:Middle Aged; D011594:Psychometrics; D011795:Surveys and Questionnaires; D016387:Women's Health