Relationship between self-efficacy and physical activity among colorectal cancer patients: A cross-sectional study.

This was a cross-sectional study, so it cannot show that higher self-efficacy causes more physical activity. All data were self-reported, so recall and subjective bias may affect both activity and confidence scores. The sample was recruited by convenience from three tertiary hospitals in Beijing, so selection bias is possible and results may not apply elsewhere. Patients with advanced cancer or problems preventing physical activity were excluded, so it says little about more severely affected patients. The association was weak: self-efficacy and income explained only 4.4% of the variation in total physical activity score. The Chinese Exercise Self-Efficacy Scale had internal consistency of 0.695 in this sample, lower than 0.86 in the original validation.

The supplied text lists the article as research support, non-U.S. Government, and includes a funding section, but does not provide a named funder or author conflict-of-interest statement.

Do not conclude that improving self-efficacy will increase physical activity. This was a cross-sectional study, the correlation was weak, and self-efficacy plus income explained only 4.4% of activity score variation.