Effect of an educational intervention based on BASNEF model on treatment adherence after coronary artery bypass surgery: A randomized clinical trial

Abstract

BACKGROUND: Coronary artery bypass graft (CABG) surgery is the most effective treatment for cardiovascular disease (CVD). Adherence to treatment after CABG surgery is very important. One of the educational models used in this regard is the BASNEF (Belief, Attitudes, Subjective Norms, and Enabling Factors) model. The present study aimed to assess the effect of an educational intervention based on BASNEF model on adherence to treatment in patients after CABG surgery. METHODS: The present study was a randomized clinical trial. In this study, 72 patients who had undergone CABG surgery participated in the two intervention and control groups. Patients in the intervention group took part in 4 40-minute educational sessions based on BASNEF model after discharge. The patients in both groups completed the Modanloo Adherence to Treatment Questionnaire (MATQ) and a researcher-made BASNEF model questionnaire before the intervention, after the educational intervention, and at the 3-month follow-up. Data were analyzed using independent t-test, chi-square test, Man-Whitney test, and repeated measures analysis of variance (ANOVA). Mauchly's sphericity test was used for testing sphericity and the Greenhouse-Geisser correction was used in the case of lack of sphericity. All P-values of less than 0.05 were considered significant. RESULTS: The total score of the MATQ and its subscales had significantly improved in the intervention group after the intervention compared with the control group (P < 0.050). In addition, the mean scores of the model constructs (knowledge, attitude, behavior intention, subjective norms, and enabling factors) had significantly improved after the intervention in the intervention group in comparison with the control group (P < 0.050). CONCLUSION: The educational intervention based on BASNEF model improved adherence to treatment in patients after CABG surgery. Moreover, the model constructs improved in the intervention group in comparison with the control group after the intervention.