ABSTRACT
The main purpose of this study was to investigate effectiveness of Mindfulness-Based Stress Reduction [MBSR] on decreasing depression in patients with chronic low back pain. The statistical population included patients with chronic low back pain who appointed the pain clinics in Tehran. Among whom 23 participants were enrolled with convenience sampling and randomly assigned into two equal experimental and control groups. The questionnaire was consisted of the depression subscale of short form known as the depression anxiety stress scale [DASS -21] which was completed by the patients in pre-test and post-test formats. The results of this research, using Mann-Whitney test, showed that the mean depression score in the experimental group has reduced significantly in comparison with the control group. According to the findings of our study, the Mindfulness-Based Stress Reduction Therapy is significantly effective in decreasing depression in patients with chronic low back pain