effectiveness of cognitive-behavioral therapy on premenstrual syndrome through compliance to treatment in an iranian sample

Background: this study aims to investigate the effectiveness of cognitive-behavioral therapy on reducing the symptoms of premenstrual syndrome based on the moderator variable of therapy compliance in an iranian sample. methods: this was a semi-experimental study, in which 56 patients with premenstrual syndrome disorder were selected using the accessible sampling method. they were all the female patients who had been referred to the gynecologic and psychiatric centers in isfahan city, and were randomly assigned into two experimental and control groups, each one comprising 28 patients. the experimental group received 10 sessions of cognitive-behavioral therapy. the patients were tested before and after intervention using the screening questionnaires of premenstrual syndrome symptoms. additionally, subjects in both experimental and control groups were divided into two groups based on the rate of their therapy compliance (from high to low or noncompliant). data was analyzed using of covariance and cohen’s size effect with spss-22. results: the results showed that the effectiveness of cognitive-behavioral therapy on reducing the symptoms of premenstrual syndrome was statistically significant. moreover, research findings have shown that the therapy was more effective on the compliant group. conclusion: according to the results, cognitive behavior therapy can be suggested as an effective therapeutic approach in reducing the symptoms of premenstrual syndrome, especially for the patients who are complient.