title: Correlates of physical activity change in patients not attending cardiac rehabilitation.
abstract: OBJECTIVE
  Limited research has identified theoretical correlates of physical activity (PA) change in patients not receiving cardiac rehabilitation. The purpose of the present study was to determine whether changes in self-efficacy, PA intention, perceived severity and susceptibility, and PA benefits/barriers were associated with changes in PA over a 12-month period in these patients.
  
  
  METHODS
  Patients (N = 555) not attending cardiac rehabilitation completed a psychosocial questionnaire in hospital and 6 and 12 months after hospitalization for a cardiac event.
  
  
  RESULTS
  Hierarchical regression analyses showed that the increase in PA from baseline to 6 months was significantly related to an increase in self-efficacy and PA intentions and a decrease in the impact of health-related barriers. Furthermore, the decrease in PA from 6 to 12 months was significantly related to a decrease in health-related benefits and PA intentions and an increase in time and health-related barriers. Finally, the increase in PA from baseline to 12 months was significantly related to an increase in health-related benefits and intentions and a decrease in health-related barriers.
  
  
  CONCLUSIONS
  Changes in PA levels over a 12-month period were associated with changes in various theoretical variables. Interestingly, the associations among these variables with PA varied as a function of time after hospitalization.
authors.affiliation: Dalhousie University, Halifax, Nova Scotia, Canada. chris.blanchard@dal.ca
authors.forename: Chris M
authors.initials: CM
authors.lastname: Blanchard
authors.forename: Robert D
authors.initials: RD
authors.lastname: Reid
authors.forename: Louise I
authors.initials: LI
authors.lastname: Morrin
authors.forename: Louise J
authors.initials: LJ
authors.lastname: Beaton
authors.forename: Andrew
authors.initials: A
authors.lastname: Pipe
authors.forename: Kerry S
authors.initials: KS
authors.lastname: Courneya
authors.forename: Ronald C
authors.initials: RC
authors.lastname: Plotnikoff
mesh_terms: D003324:Coronary Artery Disease / Q000534:rehabilitation*; D004198:Disease Susceptibility; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006304:Health Status; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012044:Regression Analysis; D020377:Self Efficacy; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D016312:Treatment Refusal