en Educational Psychology پژوهشي Original <div style="text-align: justify;"><span style="color:#339966;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:2;"><span style="page-break-after:avoid"><b>Objective:</b> Chronic pain is one of the most prevalent health problems worldwide, associated not only with physical suffering but also with numerous psychological consequences, including reduced pain management self-efficacy and chronic pain-related worry. Cognitive-Behavioral Therapy (CBT) is an evidence-based psychological approach with high potential for targeting these variables. The present study aimed to determine the effectiveness of CBT on pain management self-efficacy and reduction of chronic pain-related worry in patients with chronic pain.</span><br> <span style="page-break-after:avoid"><b>Methods</b>: This study was a randomized clinical trial with a pretest-posttest design and a control group. The statistical population included all patients with chronic pain referred to pain clinics in Tehran, Iran, in 2024. A total of 30 patients were selected using convenience sampling and then randomly assigned to two groups: experimental (<i>n</i> = 15) and control (<i>n</i> = 15). The experimental group received 10 sessions of 90-minute CBT based on a standard pain management protocol, while the control group was placed on a waiting list. Research instruments included the Pain Self-Efficacy Questionnaire (PSEQ) and the Chronic Worry Scale (CWS) for chronic pain. Data were analyzed using multivariate analysis of covariance (MANCOVA) with SPSS version 26.</span><br> <span style="page-break-after:avoid"><b>Results</b>: The results showed that CBT significantly increased pain management self-efficacy (<i>p</i> < .001) and reduced chronic pain-related worry (<i>p</i> < .001) in the experimental group compared with the control group. The effect size (eta squared) was .62 for self-efficacy and .58 for worry, indicating moderate to large effectiveness of CBT.</span><br> <b>Conclusions</b>: Cognitive-Behavioral Therapy, through restructuring dysfunctional beliefs about pain, reducing pain catastrophizing, and teaching coping skills, is an effective tool for increasing pain management self-efficacy and reducing pain-specific worry in patients with chronic pain. It is recommended that CBT be integrated as a complementary treatment in pain clinics.</span></span></span></span></div> Cognitive-Behavioral Therapy, Pain Management Self-Efficacy, Chronic Pain-Related Worry, Chronic Pain, Clinical Trial 0 0 http://ijer.hormozgan.ac.ir/browse.php?a_code=A-10-620-1&slc_lang=en&sid=1 Maryam Taheri maryam.taheri@iau.ir 10031947532846006205 10031947532846006205 No Department of Psychology, Fir.C., Islamic Azad University, Firuzabad, Iran Reza Mirzaei mirzaeireza63@iau.ir 10031947532846006206 10031947532846006206 Yes Department of Psychology, Ars.C.., Islamic Azad University, Arsanjan, Iran