northeastern Ontario men's health study
Subtitle: test-retest reliability of the Physical Activity Questionnaire.
Published: 2004
Language: eng
Number of pages: 69
Description: The test-retest reliability sub-study of Northeastern Ontario Men's Health Study (NEOMHS) was conducted on the physical activity section of the questionnaire (see Appendix A). A random sample of controls who had previously responded to the questionnaire participated in the reliability sub-study (n = 95, response rate = 66%). The weighted kappa statistic and intraclass correlation coefficients (ICC) were used to assess reliability. ICC for average lifetime activity was 0.63. For occupational activity, weighted kappas ranged from 0.56 (early 20s) to 0.65 (5 years ago). Leisure-time activity was less reliably recalled: kappa = 0.10 (strenuous, leisure-time activity in the mid-teens) to 0.49 (strenuous, leisure-time activity 5 years ago). Since the reliability of physical activity is imperfect, there may be misclassification of exposure to physical activity. Bias in the association of physical activity and prostate cancer, may occur especially if the age-period of interest is during youth (mid-teens to early 30s).
Notes: Adviser:  Andrea Sass-Kortsak.

Thesis (M.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 42-06, page: 2086.

MICR copy on microfiche (1 microfiche).