title: Effect of depression-related somatic pain on treatment satisfaction and daily living functions.
abstract: OBJECTIVE
  Recent studies suggest that depression is associated with somatic pain. Despite growing research interest in the topic, the effects of depression-related somatic pain remain unclear. The present study sought to investigate the relationships between depression-related somatic pain, treatment satisfaction, and functions of daily living, and to compare them with the relationships between these factors and mental health measures.
  
  
  METHODS
  We administered an Internet-based survey to 663 patients with depression in Japan, including questions about pain symptoms, mental health, functions of daily living, and dissatisfaction with depression treatment. The SF-8 questionnaire was used to assess functions of daily living. We conducted a multiple linear regression analysis to examine the associations between depression-related somatic pain, functions of daily living and treatment satisfaction, and between mental health measures, somatic pain and functions of daily living.
  
  
  RESULTS
  An increase per unit in the number of pain symptoms was associated with a 1.04-unit decrease in physical functioning score (P < 0.001), a 0.67-unit decrease in the role functioning-physical score (P < 0.001), and a 0.53-unit decrease in role functioning-emotional score (P = 0.0010). Meanwhile, we found no significant association between the number of pain symptoms and patients' satisfaction with treatment, and no significant association between the number of pain symptoms and social functioning.
  
  
  CONCLUSIONS
  These results suggest that even when patients report satisfaction with their treatment, they may be suffering from reduced physical functioning and role functioning. These impairments may escape clinical recognition when clinicians or patients fail to discuss pain symptoms.
authors.affiliation: Kochi University, Japan.
authors.forename: Aoi
authors.initials: A
authors.lastname: Kawamura
authors.affiliation: Department of Neuropsychiatry, Kochi Medical School, Kochi University, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Shimodera
authors.affiliation: Kyoto University Graduate School of Medicine/School of Public Health, Japan.
authors.forename: Toshi A
authors.initials: TA
authors.lastname: Furukawa
authors.affiliation: Kochi University, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Kumagai
authors.affiliation: Tokyo Metropolitan Institute of Medical Science, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nishida
authors.affiliation: Toho University School of Medicine, Tokyo, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Mizuno
authors.affiliation: Kochi University, Japan.
authors.forename: Shimpei
authors.initials: S
authors.lastname: Inoue
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology*; D000328:Adult; D015897:Comorbidity; D003866:Depressive Disorder / Q000453:epidemiology* / Q000628:therapy; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D059226:Nociceptive Pain / Q000453:epidemiology* / Q000628:therapy; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D055815:Young Adult