title: Comparison of the frequency of psychiatric disorders among patients with chronic low back pain and control group.
abstract: BACKGROUND
  Low back pain (LBP) is one of the most common complaints of patients referred to the clinics. Studies indicated that psychosocial factors have great impact on the patients' complaints and disability. The aim of this study was to evaluate a broad range of psychiatric disorders in patients with chronic LBP (CLBP) and compare them with those of the control group.
  
  
  METHODS
  We applied Symptom Checklist 90-R to compare 50 CLBP patients in the case group with 100 participants without it in the control group. The questionnaire measured somatization, obsessive-compulsive disorder, depression, anxiety, phobic anxiety, hostility, interpersonal sensitivity, paranoid ideation, and psychoticism.
  
  
  RESULTS
  Average "global severity index" was 1.10 in the case and 0.5 in the control group. Average "positive symptom total" was 45.26 in the case and 27.41 in the control group. Average "positive symptom distress index" was 2.50 in the case and 1.50 in the control group. Average scores for all test dimensions were significantly different between the two groups (P = 0.00).
  
  
  CONCLUSIONS
  All dimensions were significantly more common in CLBP patients. Therefore, early diagnosis and treatment of these disorders may improve the outcome of CLBP.
authors.affiliation: Department of Neurosurgery, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Elnaz
authors.initials: E
authors.lastname: Farajirad
authors.affiliation: Department of Neurosurgery, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Hadi
authors.initials: H
authors.lastname: Tohidi
authors.affiliation: Department of Neurosurgery, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Farajirad
keywords: Chronic low back pain; Symptom Checklist 90-R; psychiatric disorders