"How Hard Could it Be?" A Descriptive Analysis of Errors Made on a Validated Lifetime Physical Activity Questionnaire.

Background: Measuring historical physical activity in epidemiologic research depends on self-report. We aimed to describe data reporting errors women made in completing 2 validated questionnaires: Lifetime Physical Activity Questionnaire (LPAQ) and Occupational Questionnaire (OQ).

Methods: Participants--229 women aged 38 to 65 years--completed questionnaires on paper (n = 160) or by web interface (n = 69).