Treatment with antidepressant medications in private health plans.

This study analyzed 2002 MarketScan data from a convenience sample of enrollees with private health insurance from the largest U.S. firms to examine utilization, expenditures, and factors associated with antidepressant prescriptions. Of enrollees, 11% received at least one antidepressant prescription during the year with average expenditures per enrollee of $51.55. Antidepressant prescriptions were more frequently used than any form of other mental health care and for 42% of users was not associated with any clearly identified mental health or "off-label" indication. In logistical regression analyses, health plan type, prescription days supply, gender, region, age, employment status, and subscriber status were associated with unexplained antidepressant prescription use.