title: Relationship between self-efficacy and physical activity among patients with type 2 diabetes.
abstract: BACKGROUND
  While previous studies indicate a significant relationship between self-efficacy and physical activity, less research has focused on this relationship among patients with type 2 diabetes. The purpose of this investigation was to examine whether self-efficacy mediated the relationship between participation in a 1-month, print-based physical activity intervention and improvements in activity levels.
  
  
  METHODS
  Participants (N = 85; mean age = 57; 73% Caucasian; 69% female) were recruited from a community diabetes center. The intervention was individually-tailored based on theoretical constructs, including self-efficacy.
  
  
  RESULTS
  After controlling for age, baseline activity, and baseline self-efficacy, the tailored intervention was associated with significant improvements in physical activity, 95% CI [23.01, 271.68] as well as self-efficacy, CI [0.02, 3.48]. There was an indirect effect of treatment on physical activity through self-efficacy, CI [0.77, 73.11], and the direct effect of treatment on physical activity was no longer significant, CI [-7.33, 253.40], after the influences of self-efficacy change were accounted for in the model.
  
  
  CONCLUSIONS
  Results supported a mediation effect, such that the treatment effect on physical activity was completely mediated by changes in self-efficacy. Although replication is needed, results support the theoretical rationale for targeting self-efficacy to promote physical activity among patients with type 2 diabetes.
authors.affiliation: Department of Medical Humanities & Social Sciences, Florida State University College of Medicine, 1115 W. Call St., Tallahassee, FL 32306, USA. gareth.dutton@med.fsu.edu
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Dutton
authors.forename: Fei
authors.initials: F
authors.lastname: Tan
authors.forename: Bridgette C
authors.initials: BC
authors.lastname: Provost
authors.forename: Jamie L
authors.initials: JL
authors.lastname: Sorenson
authors.forename: Brandon
authors.initials: B
authors.lastname: Allen
authors.forename: Dawn
authors.initials: D
authors.lastname: Smith
mesh_terms: D003924:Diabetes Mellitus, Type 2 / Q000523:psychology* / Q000628:therapy; D005260:Female; D005500:Follow-Up Studies; D006293:Health Promotion; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D020377:Self Efficacy; D016896:Treatment Outcome