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Introduction

Results from the 2009 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 (MMI), mild mental illness (LMI), mental health service utilization, 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 other measures.

Most of these tables are trend tables presenting estimates from the 2008 and 2009 NSDUHs. Also included are three tables that present data from earlier surveys in the series, including two tables with data from 2002 to 2009 and one table with data from 2004 to 2009. Prior to the 2009 NSDUH, tables presenting information on past year mental disorders and past year mental health service utilization were included within the main Detailed Tables, which were published earlier this year.

The 2009 Mental Health Detailed Tables include estimates of the nonmedical use of prescription psychotherapeutic drugs, prescription stimulants, and methamphetamine that take into account data on methamphetamine use based on information obtained from survey items added to NSDUH in 2005 and 2006. In a methodological study, these measures were found to be noticeably higher when the data from the additional methamphetamine use items were taken into account. Estimates for use of illicit drugs overall and use of illicit drugs other than marijuana, however, were affected only minimally by these methamphetamine use items and were not revised. Section B.4.8 in Appendix B of the Results from the 2008 National Survey on Drug Use and Health: National Findings provides a discussion of the revised measures and the procedures used to generate estimates based on them.1

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 youth (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 re-introduced beginning in the 2000 NSDUH and continued through the 2009 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 from the 2002 through 2009 surveys should not be compared with estimates from the 2001 or earlier surveys to examine changes over time. Due to further survey improvements and questionnaire changes from 2002 to 2009 it is difficult to assess long term trends for some of the mental health issues (e.g., SMI, SPD, and MDE). Changes concerning mental health data are described in more detail below.

Revisions to the mental health module in the 2008 NSDUH questionnaire resulted in new estimates for adults aged 18 or older being added to the 2008 Detailed Tables (SMI, 30-day SPD, and suicidal thoughts and behavior) and the discontinuation of trends for other estimates (adult MDE and 12-month SPD). SMI estimates were not produced from 2004 through 2007, and the SMI estimates presented in the 2008 Detailed Tables are not comparable with the SMI estimates produced from NSDUH data prior to 2004. This revised module included a split-sample that resulted in some of the 2008 estimates being based on only half of the 2008 sample of adults or on 2008 data that combined the two half samples. The split sample was removed from the 2009 mental health module; therefore, all 2009 estimates are based on the full sample. Analyses during the 2009 NSDUH indicated that comparisons between 2009 and 2008 data for various measures should be based on only a subsample of the 2008 data. These measures include adult MDE and new measures of AMI, LMI, and MMI. Because of revisions in the estimation procedures during the 2012 NSDUH, past year adult AMI, LMI, and MMI estimates for the 2008 NSDUH are now based on the full 2008 sample. Adult MDE estimates for the 2008 NSDUH continue to be based on a subsample of the 2008 data. Throughout the tables, notes have been added for clarity to the applicable tables to document estimates that are based on the 2008 subsample. The questionnaire changes caused discontinuities in trends for 12-month SPD; thus, data are not included in the Detailed Tables.

There were no revisions to the 2008 questionnaire that affected measures for youths aged 12 to 17, but 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 sources of mental health service in the 2009 Mental Health Detailed Tables. Measures on mental health services from educational sources and experiences with the juvenile justice system were affected by the revisions. Estimates for these items are presented only for 2009 and include footnotes denoting new or revised items. No questionnaire changes were made in 2008 that affected 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 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 2009 National Survey on Drug Use and Health: Mental Health National Findings.

Subsets of the Detailed Tables are included in Appendices F and G of the report titled Results from the 2009 National Survey on Drug Use and Health: Volume II. Technical Appendices and Selected Prevalence Tables. A description of the survey measurement issues and the sample design and estimation procedures used in the 2009 NSDUH can be found in technical appendices within that same report.

Table Revisions (Revised Estimates for 2006 to 2010)

As of May 2012, data errors were identified that impacted estimates for the mid-Atlantic division and the Northeast region. Estimates for the mid-Atlantic division and the Northeast region were not corrected in the original versions of the 2009 Mental Health Detailed Tables; however, the erroneous data have been removed from all data files, thus any subsequent revisions to these tables (that occurred after May 2012) will exclude the erroneous data.

More specifically, during regular data collection and processing checks for the 2011 NSDUH, data errors were identified. These errors affected the data for Pennsylvania (2006 to 2010) and Maryland (2008 and 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 2009 mental health detailed tables and 2009 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.

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 SAMHSA does not recommend making comparisons between unrevised 2006-2010 estimates and estimates based on data for 2011 and subsequent years for the areas of greatest concern.

Table Revisions (Revised Adult Mental Illness Estimates for 2008 to 2011)

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. A note also 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 1.38 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. Lastly, as noted above in the Table Revisions (Revised Estimates for 2006 to 2010) section, these revised estimates are also based on a corrected data file that excludes cases with data errors. The revised tables contain a note to indicate this to the user. Tables that do not contain AMI or SMI estimates are still based on the uncorrected data.

In regard to the revisions to AMI and SMI, 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.2 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.

Table Numbering

The Mental Health Detailed Tables are numbered using a three-part numbering scheme (e.g., 1.15A). The first part of the table number (1.15A) is the subject matter section to which a particular table belongs. The second part (1.15A) is the number of the table within a particular section. The third part (1.15A) 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. Prior to the 2009 NSDUH, many of the detailed tables on mental health were included in Sections 6 and 8 of the Detailed Tables.

The three subject matter sections and the number of tables per section are as follows:

Section 1: Adult Mental Health Tables - 1.1 to 1.52
Section 2: Youth Mental Health Tables - 2.1 to 2.14
Section 3: Sample Size and Population Tables - 3.1 to 3.10

The table type indicators are primarily 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.

Locating and Accessing a Table

The Mental Health Detailed Tables are organized by table type into two categories:

Both categories are organized based on eight subject matter sections as listed below. Clicking on the subject matter section of interest will take you to an index of tables for that section. Scroll through the list of table titles to find the table of interest, and click on the table title to go directly to that table. You need to return to the Table of Contents to access tables from other sections or categories.

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

Printing a Table

For best printing results, use the PDF web file of this report located at http://oas.samhsa.gov/WebOnly.htm#NSDUHtabs.

General PDF Printing Instructions:

End Notes

1 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.

2 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.

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