Validation of the WHI brief physical activity questionnaire among women diagnosed with breast cancer.
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.
Johnson-Kozlow
Marilyn
M
San Diego State University Research Foundation, San Diego, CA, USA.
Rock
Cheryl L
CL
Gilpin
Elizabeth A
EA
Hollenbach
Kathryn A
KA
Pierce
John P
JP
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