Background and Aim Obesity with its various physical and mental problems threatens public health. This study aimed to investigate the discriminative role of metacognitive beliefs, the difficulty in emotion regulation, and codependency in women with obesity.
Methods and Materials In this causal-comparative research, 40 obese women (BMI ≥30 kg/m2) and 40 normal-weight subjects were selected by convenience sampling method. The samples were evaluated by metacognitive questionnaire, difficulties in emotion regulation scale, and the Farsi version of codependency measurement tool. We used discriminant function analysis to analyze the obtained data.
Ethical Considerations All study subjects signed the written consent form. The Research Ethics Committee of Kharazmi University approved this study (Code: IR.KHU.REC.1397.41).
Results The discriminant function could correctly classify 95% of obese people and 97.5% of normal-weight people with 3 variables of metacognitive beliefs, difficulty in emotion regulation, and codependency. In other words, 96.25% of all participants had been classified correctly.
Conclusion Distinguishing the two groups of obese and normal people, the variables of metacognitive beliefs, difficulty in emotion regulation, and codependency have a significant role. Therefore, these variables are supposedly influential psychological factors in obesity. So they can be used for its prevention and treatment.

Background and Aim Psychological factors play a significant role in the exacerbation of cardiovascular diseases. This study aimed to investigate the effectiveness of teaching emotion regulation skill (based on dialectical behavioral therapy) on cognitive emotion regulation and Quality of Life (QoL) of patients with cardiovascular diseases.
Methods and Materials The present study has a quasi-experimental design with pretest-posttest and the control group. The statistical population of the study included all patients with cardiovascular diseases in Kermanshah City, Iran in 2018. Among them, 30 participants were selected by simple random sampling method. Then, they were randomly assigned to the two groups of experimental and control (each group 15 patients). We performed the intervention of excited ordering education based on dialectical behavioral therapy for the experimental group in eight 90-minute sessions, while the control group did not receive any intervention during this period. To collect study information, we used a short form of the emotional cognitive regulation questionnaire and MacNew Quality of Life Questionnaire. To analyze the data, we used the multivariate analysis of covariance in SPSS V. 20.
Ethical Considerations The Research Ethics Committee of Kermanshah University of Medical Sciences approved this study (Code: IR.KUMS.REC.1397.39).
Results The results showed that the scores of Positive Cognitive-Emotional Strategies and quality of life of cardiovascular patients after training of emotional regulation skills based on dialectical behavioral therapy in experimental group significantly increased in comparison with control group, and also Negative Strategies Scores were decreased (P<0.01). 
Conclusion Based on our positive study results, we recommend the therapists to use psychological treatments as complementary therapies for these patients.