Perceived control and change in physical functioning after coronary artery bypass grafting: a prospective study.

We determined if perceived general and health-related control predicted change in physical functioning after coronary artery bypass grafting (CABG) in 1,038 patients. Control and physical functioning were assessed prior to hospital discharge and physical functioning also was assessed 6 weeks and 6 months later. The repeated measures outcome was modeled using a one-way analysis of covariance with interaction terms for General and Health-Related Control x Time. The sample was primarily composed of Caucasian (94%) men (73%) with a mean age of 65 +/- 11 years. Increasing health-related control was an independent predictor of positive change in physical functioning with a stronger effect in women. There was a nearly significant association between increasing general control and positive physical functioning change. Lack of significant interactions with time indicate that higher control has a beneficial impact on physical functioning change at 6 weeks and 6 months. Assessing control may help clinicians predict post-CABG physical functioning and may shape intervention efforts.