title: Factors associated with depressive symptoms in patients with chronic low back pain.
abstract: OBJECTIVE
  To investigate depressive symptoms and their related factors in patients with chronic low back pain in Korea.
  
  
  METHODS
  A cross-sectional study using data from the fourth Korea National Health and Nutrition Examination Survey (KNHANES IV) 2009 was undertaken. The sample consisted of 1,426 participants with chronic low back pain. Multifactorial regression analysis was used to identify the association between depressive symptoms and socioeconomic demographics and other chronic diseases.
  
  
  RESULTS
  Among the 371 (26.0%) patients with depression, significant factors associated with depressive symptoms were female gender (odds ratio [OR], 2.691; 95% confidence interval [CI], 1.724-4.199), medical aid beneficiary (OR, 1.371; 95% CI, 1.039-1.810), a dependent group for activities of daily living (OR, 1.570; 95% CI, 1.180-2.087), 'not good' in the perceived health category (OR, 2.309; 95% CI, 1.730-3.081) and in a cancer group (OR, 1.803; 95% CI, 1.051-3.093).
  
  
  CONCLUSIONS
  This study provides the foundation for managing patients with chronic low back pain and depressive symptoms. Clinicians managing chronic low back pain should consider risk factors for depressive symptoms.
authors.affiliation: Department of Rehabilitation Medicine, Seoul Medical Center, Seoul 131-130, Korea.
authors.forename: Jae Yong
authors.initials: JY
authors.lastname: Ha
authors.forename: Eun Soo
authors.initials: ES
authors.lastname: Kim
authors.forename: Hyo Jae
authors.initials: HJ
authors.lastname: Kim
authors.forename: Sang Jun
authors.initials: SJ
authors.lastname: Park