Table 3.3
Clients in treatment, by substance abuse problem and diagnosed co-occurring substance abuse and mental health disorders: 2005-20091
Number and percent
Substance abuse problem and diagnosed co-occurring
substance abuse and mental health disorders
Number of clients Percent distribution
2005 2006 2007 2008 2009 2005 2006 2007 2008 2009
Total2 1,081,049 1,130,881 1,135,425 1,192,490 1,182,077          
Substance abuse problem  
Clients with both alcohol and drug abuse   500,234   521,067   509,919   545,330   517,887  46.3  46.1  44.9  45.7  43.8
Clients with drug abuse only   366,640   394,295   412,400   421,583   441,128  33.9  34.9  36.3  35.4  37.3
Clients with alcohol abuse only   199,986   207,194   211,094   222,389   220,373  18.5  18.3  18.6  18.6  18.6
Diagnosed co-occurring substance abuse and mental health disorders n/a n/a   416,260   462,260   456,567 n/a 36.7 n/a  38.8  38.6
1 Survey reference dates were: March 31, 2005-2006, March 30, 2007, and March 31, 2008-2009. See Appendix A for changes in the survey base, methods, and instruments that affect analysis of trends over time.
2 Totals include clients in facilities that did not respond to the substance abuse problem question (in 2005, 14,189 clients reported by 306 facilities; in 2006, 8,325 clients reported by 278 facilities; in 2007, 2,011 clients reported by 223 facilities;  in 2008, 3,188 clients reported by 188 facilities; and in 2009, 2,690 clients reported by 152 facilities) and/or the co-occurring disorders question (in 2007, 17,399 clients reported by 338 facilities; and in 2008, 15,462 clients reported by 263 facilities; and in 2009, 13,067 clients reported by 220 facilities).
n/a  Not collected until 2007.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, National Survey of Substance Abuse Treatment Services (N-SSATS), 2005-2009. 

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