Psychiatric disorders during adolescence and relationships with peers from age 17 to age 27.

Objective: To investigate normative patterns of peer relationships from ages 17 to 27, and to examine the impact of adolescent psychiatric disorders on peer relationships.
Method: Psychiatric disorders were measured at a mean age 16 years. At mean age 29, 200 participants completed detailed narrative interviews about their transition to adulthood. Monthly contact and conflict with peers were described in narratives covering ages 17-27.
Results: Adolescent psychiatric disorders did not predict the frequency of peer contact in the young adult period. However, adolescent disruptive disorders predicted greater peer conflict regardless of contact frequency. Adolescents with major depressive or substance abuse disorders and subsequent high frequency of peer contact reported elevated peer conflict during the transition to adulthood. In contrast, among study participants with frequent peer contact during this period, those with adolescent anxiety disorders reported less peer conflict than did those without such a diagnostic history.
Conclusions: Adolescents with major depressive, disruptive, and substance abuse disorders may be at risk for long-term negative peer relationships, whereas those with anxiety disorders may subsequently avoid peer conflict.