A quantitative bias analysis to estimate measurement error-related attenuation of the association between self-reported physical activity and colorectal cancer risk
Shahid Mahmood, Nga H Nguyen, Julie K Bassett, Robert J MacInnis, Amalia Karahalios, Neville Owen, Fiona J Bruinsma, Roger L Milne, Graham G Giles, Dallas R English, Brigid M Lynch
International Journal of Epidemiology | OXFORD UNIV PRESS | Published : 2020
BACKGROUND: Self-reported physical activity is inaccurate, yet few investigators attempt to adjust for measurement error when estimating risks for health outcomes. We estimated what the association between self-reported physical activity and colorectal cancer risk would be if physical activity had been assessed using accelerometry instead. METHODS: We conducted a validation study in which 235 Australian adults completed a telephone-administered International Physical Activity Questionnaire (IPAQ), and wore an accelerometer (Actigraph GT3X+) for 7 days. Using accelerometer-assessed physical activity as the criterion measure, we calculated validity coefficients and attenuation factors using a ..View full abstract
Awarded by NHMRC Senior Principal Research Fellowship
Awarded by NHMRC Centre for Research Excellence Grant (NHMRC)
Awarded by National Breast Cancer Foundation
S.M. was a recipient of a Melbourne International Fee Remission Scholarship (MIFRS) and a Melbourne International Research Scholarship (MIRS); N.O. was supported by an NHMRC Senior Principal Research Fellowship (#1003960), an NHMRC Centre for Research Excellence Grant (NHMRC #1057608) and by the Victorian Government's Operational Infrastructure Support Program; B.M.L. was supported by a fellowship from the National Breast Cancer Foundation (#ECF-15-012).