Table 7Past year mental illness among adults, by past year substance use disorder status: percentage, United States, 2011

[Data are based on a household survey of a nationally representative sample]

Level of mental illnessNo substance use disorder, including nicotine dependence1 (percent)No substance use disorder, excluding nicotine dependence2 (percent)Substance use disorder, including nicotine dependence3 (percent)Substance use disorder, excluding nicotine dependence4 (percent)Past month nicotine dependence (percent)Past year alcohol use disorder (percent)Past year illicit drug5 use disorder (percent)
Any mental illness14.716.230.736.130.234.946.4
Mental illness with mild functional impairment8.58.913.816.312.916.217.5
Mental illness with moderate functional impairment3.64.17.88.57.98.211.1
Mental illness with serious functional impairment2.63.29.211.29.510.517.7
1

No substance use disorder, including nicotine dependence, means that the person did not have an alcohol or illicit drug use disorder or nicotine dependence.

2

No substance use disorder, excluding nicotine dependence, means that the person did not have an alcohol or illicit drug use disorder but may or may not have had nicotine dependence.

3

Any substance use disorder, including nicotine dependence, means that the person had an alcohol or illicit drug use disorder or nicotine dependence.

4

Any substance use disorder, excluding nicotine dependence, means that the person had an alcohol or illicit drug use disorder but may or may not have had nicotine dependence.

5

Illicit drugs include marijuana/hashish, cocaine (including crack), heroin, hallucinogens, inhalants, or prescription-type psychotherapeutics used nonmedically, including data from original methamphetamine questions but not including new methamphetamine items added in 2005 and 2006.

NOTES: Mental illness among adults is defined according to two dimensions: (1) the presence of a diagnosable mental, behavioral, or emotional disorder in the past year (excluding developmental and substance use disorders) of sufficient duration to meet diagnostic criteria specified in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) (APA, 1994); and (2) the level of interference with or limitation of one or more major life activities resulting from a disorder (functional impairment). Adult National Survey on Drug Use and Health (NSDUH) respondents' mental illness was determined based on modeling their responses to questions on distress (K6 scale) and impairment (truncated version of the World Health Organization Disability Assessment Schedule). Mental illness with serious functional impairment among adults is defined as having, currently or at any time in the past year, a diagnosable mental, behavioral, or emotional disorder as defined above that results in substantial impairment in carrying out major life activities, based on Global Assessment of Functioning scores of 50 or less. Any mental illness is defined as having, currently or at any time in the past year, a diagnosable mental, behavioral, or emotional disorder as defined above, regardless of the level of impairment in carrying out major life activities. This includes persons with mental illness having mild, moderate, or serious functional impairment; mental illness with serious functional impairment is a subset of any mental illness.

Substance use disorder is defined as meeting the criteria for alcohol or illicit drug abuse or dependence. Abuse and dependence are based on definitions in DSM-IV and follow diagnostic hierarchy rules for abuse and dependence.

Adults are defined as people aged 18 or older.

Nicotine (cigarette) dependence is based on criteria derived from the Nicotine Dependence Syndrome Scale or the Fagerström Test of Nicotine Dependence. See Section B.4.2 in Appendix B of the Results from the 2009 National Survey on Drug Use and Health: Volume II. Technical appendices and selected prevalence tables (SAMHSA, 2010b).

As an example of how to interpret the estimates in the table, in 2011, 14.7 percent of U.S. adults with no substance use disorder, including nicotine dependence, had any mental illness in the past year.

SOURCE: National Survey on Drug Use and Health, 2011 (revised May 2013) Substance Abuse and Mental Health Services Administration, Center for Behavioral Health Statistics and Quality; .

From: 5, TABLES

Cover of Behavioral Health, United States, 2012
Behavioral Health, United States, 2012.

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