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Open Access Publications from the University of California

Validation of the WHI brief physical activity questionnaire among women diagnosed with breast cancer.

  • Author(s): Johnson-Kozlow, Marilyn
  • Rock, Cheryl L
  • Gilpin, Elizabeth A
  • Hollenbach, Kathryn A
  • Pierce, John P
  • et al.

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.

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