Results from the 2011 National Survey on Drug Use and Health: Mental Health Detailed Tables is a collection of tables presenting national estimates from the National Survey on Drug Use and Health (NSDUH). These tables present information on past year mental health measures and past year mental health service utilization for youths aged 12 to 17 and adults aged 18 or older. Adult tables include measures on any mental illness (AMI), serious mental illness (SMI), moderate mental illness, low (mild) mental illness, mental health service utilization (i.e., mental health treatment or counseling), suicidal thoughts and behaviors, major depressive episode (MDE), treatment for depression (among adults with MDE), and serious psychological distress (SPD). Youth tables include measures on mental health service utilization, MDE, and treatment for depression (among youths with MDE). Measures related to the co-occurrence of mental disorders with substance use or with substance use disorders also are presented for both adults and youths. Measures of these characteristics and behaviors are presented by a variety of demographic, geographic, and other variables. The estimates in the tables include rates of persons having the characteristics, numbers of persons with these characteristics, and corresponding standard errors.
The majority of these tables are trend tables presenting estimates from the 2010 and 2011 NSDUHs. Also included are nine tables that present data from earlier surveys in the series, including two tables with data from 2002 to 2011, two tables with data from 2005 to 2011, four tables with data from 2008 to 2011, and one table with data from 2004 to 2011.
Throughout the survey series, the NSDUH questionnaire has been used to collect data on special topics, such as mental health. Questions on mental health for youths aged 12 to 17 and adults aged 18 or older were first introduced in the 1994 NSDUH and continued through the 1997 NSDUH. Mental health questions were reintroduced beginning in the 2000 NSDUH and continued through the 2011 NSDUH. Because of survey improvements in the 2002 NSDUH, the 2002 data constitute a new baseline for tracking trends in substance use and mental health measures. Therefore, estimates beginning with the 2002 survey should not be compared with estimates from the 2001 or earlier surveys to examine changes over time. Because of further survey improvements and questionnaire changes between 2002 and 2011, it is not possible to assess long-term trends for all of the mental health issues.
Revisions made to the mental health module in the 2008 NSDUH questionnaire resulted in new estimates for adults aged 18 or older for measures such as AMI, SMI, 30-day SPD, and suicidal thoughts and behavior. SMI estimates produced from 2008 or later years of NSDUH data are not comparable with SMI estimates produced from NSDUH data prior to 2004, and SMI estimates were not produced from 2004 through 2007. Thus, long-term trend estimates are not available for SMI. Because of the 2008 questionnaire revisions, several estimates (MDE and 12-month SPD) were affected by context effects. However, an adjustment for the questionnaire changes was applied to estimates of MDE for 2005 to 2008. For more detailed information, see Section B.4.4 in Appendix B of the Results from the 2010 National Survey on Drug Use and Health: Mental Health Findings.1 Therefore, long-term trend estimates for these two measures are available from 2005 through 2011. There were no additional questionnaire changes in 2009 to 2011 that led to changes in these adult measures. No questionnaire changes have been implemented that affected the adult mental health service utilization questions; therefore, estimates of mental health service utilization presented in these mental health detailed tables reflect trends from 2002 to 2011.
There were no questionnaire revisions that affected MDE for youths aged 12 to 17; thus, long-term trend estimates are available from 2004 through 2011. However, revisions to the youth mental health service utilization module of the 2009 NSDUH questionnaire resulted in new estimates and a discontinuation of trends for several items on the source of mental health services. New questions regarding the receipt of mental health services from juvenile justice sources were added, and questions regarding services from educational sources were revised and are not comparable with estimates prior to 2009.
For detailed information on revisions to both the adult and the youth mental health items, see Sections B.4.2 to B.4.4 in Appendix B of the Results from the 2010 National Survey on Drug Use and Health: Mental Health Findings.2
A description of the survey measurement issues and the sample design and estimation procedures used in the 2011 NSDUH can be found in technical appendices within the Results from the 2011 National Survey on Drug Use and Health: Mental Health Findings.3 Definitions for many of the measures and terms used in these mental health detailed tables and in the mental health national findings report can be located in the Key Definitions for the 2011 Mental Health Detailed Tables and Mental Health Findings Report (i.e., the glossary) that is provided with these mental health detailed tables.4 Where relevant, the glossary provides cross-references between terms and specific question wording for clarity.
During regular data collection and processing checks for the 2011 NSDUH, data errors were identified. These errors affected the data for Pennsylvania 2006-2010) and Maryland (2008-2009). Cases with erroneous data were removed from the data files, and the remaining cases were reweighted to provide representative estimates. The errors had minimal impact on the national estimates and no effect on direct estimates for the other 48 States and the District of Columbia. In reports where model-based small area estimation techniques are used, estimates for all States may be affected, even though the errors were concentrated in only two States. In reports that do not use model-based estimates, the only estimates appreciably affected are estimates for Pennsylvania, Maryland, the mid-Atlantic division, and the Northeast region. The 2011 mental health detailed tables and 2011 mental health findings report do not include division-level, State-level, or model-based estimates. However, they do show region-level estimates, including the Northeast region. Estimates based on 2006 through 2010 data may differ from previously published estimates. Estimates based only on 2011 data are unaffected by these data errors. All impacted tables (i.e., tables with estimates based on 2006-2010 data) contain a note to indicate this to the user.
Caution is advised when comparing data from older reports with data from more recent reports that are based on corrected data files. As discussed above, comparisons of estimates for Pennsylvania, Maryland, the mid-Atlantic division, and the Northeast region are of most concern, while comparisons of national data or data for other States and regions are essentially still valid. The Center for Behavioral Health Statistics and Quality within the Substance Abuse and Mental Health Services Administration does not recommend making comparisons between unrevised 2006-2010 estimates and estimates based on 2011 data for the areas of greatest concern.
As of October 2013, tables containing estimates for past year AMI and SMI for adults have been revised. These tables have been denoted with the word "(REVISED)" placed between the table's number and title. In addition, a note appears with each revised table to briefly explain that the revision is due to revised estimation procedures. Additionally, in previous versions of the mental illness tables, Table 1.49 contained estimates for adults of past year suicidal thoughts, suicide plans, and suicide attempts by past year level of mental illness. This table was removed from the revised mental illness tables, and the subsequent tables were renumbered. This table was removed because of analysis limitations resulting from the revised estimation procedures.
More specifically, the Substance Abuse and Mental Health Services Administration (SAMHSA) has been publishing estimates of the prevalence of past year AMI and SMI among adults aged 18 or older since the release of the 2008 NSDUH national findings report.5 Estimates were based on a model developed in 2008. In 2013, SAMHSA developed a more accurate model for the 2012 data. This revised model incorporates the NSDUH respondent's age and indicators of past year suicide thoughts and depression, along with the variables that were specified in the 2008 model (Kessler-6 [K6] questions on psychological distress and an abbreviated set of questions on impairment in carrying out activities from the World Health Organization Disability Assessment Schedule [WHODAS]), leading to more accurate estimates of AMI and SMI. Other mental health measures, such as MDE, SPD, and serious thoughts of suicide, were not affected. It is recommended that the mental illness variables derived from the 2012 model not be used when analyzing variables for past year suicidal thoughts, past year MDE, the K6, or the WHODAS, and it is also recommended that the mental illness variables derived from the 2012 model not be used when analyzing other closely linked variables (including, past year suicide attempts, past year suicide plans, medical treatment for suicide attempts, lifetime MDE, SPD, or components used in the K6 or WHODAS scales). For these revised tables, estimates are based on the 2012 model. For further information on the revised model see the NSDUH short report titled Revised Estimates of Mental Illness from the National Survey on Drug Use and Health at http://samhsa.gov/data/default.aspx.
The mental health detailed tables are numbered using a three-part numbering scheme (e.g., 1.21A). The first part of the table number (1.21A) is the subject matter section to which a particular table belongs. The second part (1.21A) is the number of the table within a particular section. The third part (1.21A) is a table type indicator, an alphabetic letter appended to the table number. Each table number, as explained below, has multiple table types. Tables are numbered sequentially within each subject matter section. To the extent possible, identical tables are assigned the same table number each year except in the case where specific tables are removed or added.
The three subject matter sections and the number of tables per section are as follows:
Section 1: Adult Mental Health Tables - 1.1 to 1.68
Section 2: Youth Mental Health Tables - 2.1 to 2.14
Section 3: Sample Size and Population Tables - 3.1 to 3.8
The table type indicators are defined as follows:
|Table Type||Purpose of the Table|
|A:||Presents estimates of the numbers of persons exhibiting the specified behavior or characteristic (e.g., substance use) in the populations described by the column and row headings.|
|B:||Presents estimates of the percentages of persons exhibiting the specified behavior or characteristic (e.g., substance use) in the populations described by the column and row headings.|
|C:||Presents the standard error associated with each of the estimates in the "A" tables.|
|D:||Presents the standard error associated with each of the estimates in the "B" tables.|
|N:||Presents the number of cases in the specified NSDUH sample with the characteristics defined by the column and row headings.|
|P:||Presents the p values from tests of the statistical significance of differences between columns in the "B" tables.|
Section 1 and Section 2 tables within the mental health detailed tables contain five table types (A, B, C, D, and P) as defined above. Section 3 tables contain three table types (A, C, and N). Note that table type N is used exclusively within Section 3 to display the sample size counts.
The mental health detailed tables are organized by table type into two categories:
Both categories are organized based on three subject matter sections as listed below. Clicking on the subject matter section of interest takes users to a list of tables for that section. Users can scroll through the list of table titles to find the table of interest, then click on the table title to go directly to that table. Users need to return to the table of contents to access tables from other sections or categories.
The Key Definitions for the 2011 Mental Health Detailed Tables and Mental Health Findings Report (i.e., the glossary) defines and cross-references key measures used in the 2011 mental health detailed tables and the 2011 mental health findings report. This may be helpful when used in conjunction with the list of tables in identifying tables that contain information for selected measures. However, not all measures and terms listed in the glossary are specifically mentioned in the table index or list of tables.
The three subject matter sections are as follows:
Section 1: Adult Mental Health Tables
Section 2: Youth Mental Health Tables
Section 3: Sample Size and Population Tables
For best printing results, use the PDF-Web file of this report located at http://www.samhsa.gov/data/NSDUH.aspx.
1 Center for Behavioral Health Statistics and Quality. (2012). Results from the 2010 National Survey on Drug Use and Health: Mental health findings (HHS Publication No. SMA 11-4667, NSDUH Series H-42). Rockville, MD: Substance Abuse and Mental Health Services Administration.
2 See footnote 1.
3 Center for Behavioral Health Statistics and Quality. (2012). Results from the 2011 National Survey on Drug Use and Health: Mental health findings (HHS Publication No. SMA 12-4725, NSDUH Series H-45). Rockville, MD: Substance Abuse and Mental Health Services Administration.
4 Prior to the 2010 NSDUH, a glossary of key definitions appeared as an appendix in each year's national findings report.
5 Office of Applied Studies. (2009). Results from the 2008 National Survey on Drug Use and Health: National findings (HHS Publication No. SMA 09-4434, NSDUH Series H-36). Rockville, MD: Substance Abuse and Mental Health Services Administration.