Comparison of Metacognitive Beliefs Between Patients with Unipolar Depression and Bipolar Depression

Objective: The aim of this article is to compare differences in metacognitive beliefs between bipolar disorder type I depressed (BPD1) patients with Unipolar Depression (UPD) patients, and a control group; and to discuss the relationship between metacognitive beliefs and depression parameters. Methods: Sixty six consecutive outpatients with a diagnosis of depressed BPD1, 70 patients with UPD and 70 healthy controls were enrolled in the study. Following assessment with the Sociodemographic Data Form, Structured Clinical Interview for DSM-IV (SCID-I), Hamilton Depression Rating Scale (HAM-D), Hamilton Anxiety Rating Scales (HAM-A), Young Mania Evaluation Scale, and the Metacognition Questionnaire-30 (MCQ-30). Results: UPD and BPD1 patients included in the study had higher scores in metacognitive beliefs other than positive beliefs compared with healthy controls (p0.05). A statistically significant positive correlation was observed between the HAM-A, HAM-D scores and MCQ-30 scores in UPD group (p0.05). Discussion: The metacogitive structures of UPD and BPD1, may be helpful in identifying and choosing the right treatment modality. We think that our results may have implications for the metacognitive approaches in the treatment of BPD1. Keywords: Bipolar disorder, unipolar depression, bipolar depression, metacognition, metacognitive beliefs