In 2009, there were an estimated 45.1 million adults aged 18 or older in the United States
with any mental illness in the past year. This represents 19.9 percent of all adults in this
country. Among adults aged 18 or older in 2009, the percentage having serious mental illness
(SMI) in the past year was 4.8 percent (11.0 million adults).
Women aged 18 or older were more likely than men aged 18 or older to have past year any
mental illness (23.8 vs. 15.6 percent) and SMI (6.4 vs. 3.2 percent).
In 2009, an estimated 8.4 million adults (3.7 percent) aged 18 or older had serious thoughts
of suicide in the past year. Among adults aged 18 or older, 2.2 million (1.0 percent) made
suicide plans in the past year, and 1.0 million (0.5 percent) attempted suicide in the past year.
Among the 45.1 million adults aged 18 or older with any mental illness in the past year, 19.7
percent (8.9 million adults) met criteria for substance dependence or abuse in that period
compared with 6.5 percent (11.9 million adults) among those who did not have mental illness
in the past year. Among the 11.0 million adults aged 18 or older with SMI in the past year,
25.7 percent also had past year substance dependence or abuse compared with 6.5 percent of
adults who did not have mental illness.
Among the 2.8 million adults aged 18 or older in 2009 with both SMI and substance
dependence or abuse in the past year, 62.4 percent received substance use treatment at a
specialty facility or mental health treatment in that period. Included in the 62.4 percent are
13.5 percent who received both mental health treatment and specialty substance use
treatment, 47.3 percent who received mental health treatment only, and 1.6 percent who
received specialty substance use treatment only.
In 2009, there were 2.0 million youths (8.1 percent of the population aged 12 to 17) who had
major depressive episode (MDE) during the past year. Among youths aged 12 to 17 in 2009
who had past year MDE, 35.7 percent used illicit drugs in the past year compared with 18.0
percent among youths who did not have past year MDE.
Source: Substance Abuse and Mental Health Services Administration, news release, Nov. 18, 2010