The course of chronic pain with and without psychiatric disorders: a 6-year follow-up study from childhood to adolescence and young adulthood.

Objective: Psychiatric disorders are common in children with chronic pain, but their course and impact when children grow up are unknown. This study examines the 6-year clinical outcome of children referred for chronic pain with and without comorbid psychiatric disorders.

Method: In 91 children and adolescents (aged 8 to 17 years) referred to a university outpatient clinic for chronic pain, child psychiatric disorders were assessed using the Diagnostic Interview Schedule for Children-parent version (DISC-P) between 2000 and 2002. Participants (aged 13 to 24 years) were reassessed on average 6-years later. Outcome measures were chronic pain and psychiatric disorders assessed with the Diagnostic Interview Schedule for Children-children version (DISC-C) or the Composite International Diagnostic Interview (CIDI) and Diagnostic Interview Schedule IV (DIS).

Results: After 6 years, 75% of the participants still experienced chronic pain and 15% were in complete remission of both chronic pain and psychiatric disorder. The prevalence of psychiatric disorders (both persistent and new onset disorders) at follow-up was 32%. Baseline psychiatric disorder was a predictor of psychiatric disorder at follow-up (OR = 2.6, 95% CI = 1.1-6.5, P = .04; adjusted OR = 2.8, 95% CI = 1.1-7.1, P = .03) but did not predict persistence of chronic pain.

Conclusions: Children referred for chronic pain frequently continue to suffer from chronic pain and psychiatric disorders in adolescence and young adulthood. In this population, comorbid psychiatric disorder at study entry was a predictor of psychiatric disorder, but not of persistent chronic pain, in adolescence and young adulthood.