# Introduction

Results from the 2005 National Survey on Drug Use and Health: Detailed Tables is a collection of tables generated using data from the National Survey on Drug Use and Health (NSDUH). Prior to 2002, the survey was called the National Household Survey on Drug Abuse (NHSDA). Although the majority of these tables are trend tables presenting estimates from the 2004 and 2005 NSDUHs, a selected number present only estimates from the 2005 NSDUH if the same or comparable data are not available from 2004. Also, a selected number of tables contain annual averages, which are generated by combining 2 years of data if there are not sufficient data within a single year to produce reliable estimates. These tables may provide annual averages combining data for 2004 and 2005, 2003 and 2004, and 2002 and 2003. Also included are a number of tables that present data from earlier surveys in the series, including several tables presenting data from 2002 to 2005 and a couple of tables presenting data from 1971 to 2005. A number of tables related to respondents' mental health status were produced based on a subsample of respondents aged 18 or older.1 Finally, tables were created that present estimates corresponding to the Healthy People 2010 Objectives.2

Because of survey improvements in the 2002 NSDUH, the 2002 data constitute a new baseline for tracking trends in substance use and other measures. Therefore, estimates from the 2002 through 2005 surveys should not be compared with estimates from the 2001 or earlier surveys to examine changes over time. Methodology changes throughout NSDUH's history make it difficult to assess long-term trends from tables presenting data from 1971 to 2005. However, it is instructive to compare NSDUH estimates from 1971 to 2005 by "piecing together" the data from time periods for which data are comparable. Specifically, valid trend comparisons can be made for 1971-1998, 1999-2001, and 2002-2005. With this approach, comparisons between 1998 and 1999, and between 2001 and 2002, should be made with caution because they are potentially biased due to changes in methods. Nevertheless, when these data are combined in a single presentation, it often becomes clear that the effects of the methods changes are small compared with the major shifts in substance use prevalence that have occurred over the past three and a half decades.

Subsets of the Detailed Tables are included in Appendices F and G of the report titled Results from the 2005 National Survey on Drug Use and Health: National Findings.3 Tables included in Appendices F and G can be mapped back to these Detailed Tables by using the table number reference included in parentheses in the upper left-hand corner of each table in the appendix (e.g., Table F.1 is the equivalent of Table 9.1N). A description of the survey measurement issues, as well as the sample design and estimation procedures used in the 2005 NSDUH, can be found in technical appendices of this same report.

#### Table Numbering

The 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. There are multiple table types for each table number.

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

> Section 1: Illicit Drug Use Tables – 1.1 to 1.132
> Section 2: Tobacco Product and Alcohol Use Tables – 2.1 to 2.114
> Section 3: Risk and Protective Factor Tables – 3.1 to 3.69
> Section 4: Incidence Tables – 4.1 to 4.16
> Section 5: Dependence, Abuse, and Treatment Tables – 5.1 to 5.82
> Section 6: Mental Health Tables – 6.1 to 6.67
> Section 7: Miscellaneous Tables – 7.1 to 7.133
> Section 8: Trend Tables – 8.1 to 8.37
> Section 9: Sample Size and Population Tables – 9.1 to 9.22

The table type indicators are primarily defined as follows; however, some exceptions do exist and are noted in the bullets below.

Table Type | Purpose of the Table
--- | ---
A: | Presents estimates of the numbers of persons who have used the substance(s) in the populations described by the column and row headings.
B: | Presents estimates of the percentages of persons who have used the substance(s) 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. Starting with the 2005 NSDUH, a "mixed" method approach was implemented for all the 2005 Detailed Tables to reflect more accurately the effects of the weighting process on total estimates that were underestimated previously. This mixed method had been applied to various selected tables in prior NSDUHs, but it was implemented across all tables for the 2005 NSDUH. As a result of the employment of this mixed method approach, the standard errors for the total estimates within many Detailed Tables were calculated differently compared with those that appear in prior NSDUH reports.4
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.

The majority of tables within the Detailed Tables contain five table types (A, B, C, D, and P) as defined above. Note that table type N is used exclusively within Section 9 to display the sample size counts. Exceptions to this organization are noted below.

- Section 4 (Incidence Tables) contains both tables for which only table types A and C are produced and tables for which only table types B, D, and P are produced. Specifically, one subset of tables (4.9 to 4.12) includes table types A and C. This subset of tables presents the number of past year initiates in table type A and the associated standard errors in table type C. The remaining Section 4 tables include only table types B, D, and P. Tables 4.1 to 4.8 present numbers and percentages of past year initiates in table type B, associated standard errors for each of these estimates in table type D, and p values from tests of statistical differences between years in table type P. Tables 4.13 to 4.16 present the mean age for past year initiates in table type B, associated standard errors in table type D, and p values from tests of statistical differences between years in table type P.
- Section 6 (Mental Health Tables) contains three tables for which only table types A, B, C, and D are produced (6.41, 6.66, and 6.67). These three tables present estimates for the 2005 NSDUH data only; thus, these are not trend tables, so significance tests between years are not relevant and table type P is not applicable.
- Section 7 (Miscellaneous Tables) contains one subset of tables for which only table types B and D are produced (7.7 to 7.12). This subset of tables presents estimates for the 2005 NSDUH only; thus, these are not trend tables, so significance tests between years are not relevant and table type P is not applicable. Additionally for this subset of tables, table type B presents not only estimated percentages, but also estimated averages and totals; thus, the associated standard errors for each of these estimates are presented in table type D, and table types A and C are not utilized. Section 7 also includes two subsets of tables for which only table types A, B, C, and D are produced (7.53 to 7.57 and 7.117 to 7.126). These subsets of tables present estimates for the 2005 NSDUH only; thus, these are not trend tables, so significance tests between years are not relevant and table type P is not applicable.
- Section 8 (Trend Tables) contains one subset of tables for which only table types B and D are produced (8.36 and 8.37). These are multiyear tables that present estimated percentages for 1971 to 2005 in table type B and associated standard errors in table type D. The estimated total number of users and associated standard errors are not presented, nor are between-year significance tests implemented; thus, table types A, C, and P are not utilized.
- Section 9 (Sample Size and Population Tables) contains only table types A, C, and N. Population counts, standard errors, and sample sizes are displayed in table types A, C, and N, respectively. Percentages of the population and associated standard error tables are not provided in this section.

#### Locating and Accessing a Table

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

- Prevalence Estimates and Sample Sizes – Table Types A, B, and N
- Standard Errors and P Values – Table Types C, D, and P.

Both categories are organized based on nine 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 nine subject matter sections are as follows:

> Section 1: Illicit Drug Use Tables
> Section 2: Tobacco Product and Alcohol Use Tables
> Section 3: Risk and Protective Factor Tables
> Section 4: Incidence Tables
> Section 5: Dependence, Abuse, and Treatment Tables
> Section 6: Mental Health Tables
> Section 7: Miscellaneous Tables
> Section 8: Trend Tables
> Section 9: Sample Size and Population Tables

#### Printing a Table

For best printing results, use the PDF web file of this report located at http://www.oas.samhsa.gov/NSDUH/2k5nsduh/tabs/2k5tabs.pdf.

#### General PDF Printing Instructions:

- To print a PDF document, find and click on the print icon of your browser's document window (its placement varies depending on browser type and browser version). Alternatively, select File from your browser's pull-down menu and choose Print.
- From the print dialog window, be sure to specify whether you want to print the current page, a selected range of pages, or the entire document. If you do not indicate differently, you will get all the pages in the file printed. Your Zoom In tool (e.g., sometimes shown as a magnifying glass with a plus sign inside) can be used to enlarge the screen text size any time you want.

#### End Notes

1 See Sections A.1 and A.3.2 in Appendix A of Office of Applied Studies. (2005). Results from the 2004 National Survey on Drug Use and Health: National Findings (DHHS Publication No. SMA 05-4062, NSDUH Series H-28). Rockville, MD: Substance Abuse and Mental Health Services Administration. Also see Sections B.4.4 and B.4.5 in Appendix B of Office of Applied Studies. (2006). Results from the 2005 National Survey on Drug Use and Health: National Findings (DHHS Publication No. SMA 06-4194, NSDUH Series H-30). Rockville, MD: Substance Abuse and Mental Health Services Administration.

2 Additional information on the Healthy People 2010 Objectives may be obtained at http://www.healthypeople.gov/.

3 Office of Applied Studies. (2006). Results from the 2005 National Survey on Drug Use and Health: National Findings (DHHS Publication No. SMA 06-4194, NSDUH Series H-30). Rockville, MD: Substance Abuse and Mental Health Services Administration.

4 See Section B.2.1 in Appendix B of Office of Applied Studies. (2006). Results from the 2005 National Survey on Drug Use and Health: National Findings (DHHS Publication No. SMA 06-4194, NSDUH Series H-30). Rockville, MD: Substance Abuse and Mental Health Services Administration.

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