The study found that 45.8 percent of the 2,188 college students and 47.7 percent of the young adults not in college met the criteria for at least one psychiatric disorder, but only 25 percent of those with disorders sought treatment over a one-year period.
Among college students, the most common disorders were alcohol use (20.4 percent) and personality disorders (17.7 percent). The most common disorders among young adults not in college were personality disorders (21.6 percent) and nicotine dependence (20.7 percent).
College students were less likely to have drug-use disorders, nicotine dependence or bipolar disorder, and were less likely to have used tobacco than young adults not in college. But college students risk of alcohol use disorders was much greater. College students were significantly less likely than young adults not in college to receive treatment for alcohol or drug-use disorders.
The study was published in the December issue of the Archives of General Psychiatry.