en آموزشی Educational پژوهشي Research <div style="text-align: justify;"><strong>Introduction:&nbsp;</strong>Evaluating self-efficacy beliefs is essential to the post-operative care program in cardiovascular bypass patients. The&nbsp;present study aimed to investigate the role of self-efficacy beliefs in positive and negative perceptions of stress in coronary artery bypass patients.</div> <div style="text-align: justify;"><strong>Methods:</strong> The research method was descriptive-analytic, and its population consisted of patients with coronary artery bypass who&nbsp;were referred to the education and treatment specialist center of Vali-e-Asr Hospital, Birjand, Iran, in 2016. The available sampling&nbsp;method was applied, and 229 patients were selected. Data were collected using questionnaires of Zand&#39;s self-efficacy beliefs and&nbsp;Cohen&#39;s perceived stress. The data were then analyzed by SPSS (Version-23) using the Pearson correlation test, stepwise regression,&nbsp;and independent-sample t-test.</div> <div style="text-align: justify;"><strong>Results:</strong> The findings showed a significant correlation between the variables of research. Among the components of self-efficacy&nbsp;beliefs, physical activity predicted a positive perception of stress (R=0.274). Moreover, physical activity and psychosocial stresses&nbsp;could predict negative perceptions of stress. The negative perception of stress and self-efficacy beliefs were significantly different&nbsp;between male and female patients (P<0.05).</div> <div style="text-align: justify;"><strong>Conclusion:&nbsp;</strong>According to the findings, physical activity, as one of the dimensions of self-efficacy beliefs, has a positive effect on the&nbsp;perception of stress. Therefore, self-efficacy beliefs are valuable tools for health care providers and staff. Furthermore, evaluating patients&#39; self-efficacy beliefs and improvements can increase their motivation to take care of themselves.</div> Coronary Artery Bypass, Patients, Stress, Self-Efficacy 114 121 http://jsurgery.bums.ac.ir/browse.php?a_code=A-10-25-1&slc_lang=en&sid=1 Abbas Javadi javadi56@yahoo.com 10031947532846008158 10031947532846008158 No Assistant Professor, Social Determinants of Health Research Center, Birjand University of Medical sciences, Birjand, Iran Ahmad Amouzeshi amouzeshiahmad@gmail.com 10031947532846008159 10031947532846008159 No Professor of Cardiovascular Surgery, Department of Cardiology, School of Medicine, Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran Fatemeh Barani amouzeshiahmad@gmail.com 10031947532846008160 10031947532846008160 Yes MSc in General Psychology, Social Determinants of Health Research Center, Birjand University of Medical Sciences, Birjand, Iran