Table 3.3. Clients in treatment, by substance abuse problem and diagnosed co-occurring substance abuse and mental disorders: 2007-20111
Number and percent distribution
Substance abuse problem and diagnosed co-occurring
substance abuse and mental disorders
Number of clients Percent distribution
2007 2008 2009 2010 2011 2007 2008 2009 2010 2011
Total2 1,135,425 1,192,490 1,182,077 1,175,462 1,224,127 100.0 100.0 100.0 100.0 100.0
Substance abuse problem  
Clients with both alcohol and drug abuse 509,919 545,330 517,887 498,671 535,258 44.9 45.7 43.8 42.4 43.7
Clients with drug abuse only 412,400 421,583 441,128 459,069 464,406 36.3 35.4 37.3 39.1 37.9
Clients with alcohol abuse only 211,094 222,389 220,373 215,101 221,632 18.6 18.6 18.6 18.3 18.1
Diagnosed co-occurring substance abuse and mental disorders 416,260 462,260 456,567 479,699 506,162 36.7 38.8 38.6 40.8 41.3
1 Survey reference dates were March 30, 2007, and March 31, 2008-2011. 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 2007, 2,011 clients reported by 223 facilities; in 2008, 3,188 clients reported by 188 facilities; in 2009, 2,690 clients reported by 152 facilities; in 2010, 2,620 clients reported by 174 facilities; and in 2011, 2,832 clients reported by 188 facilities)
NOTE: Numbers may not sum to totals and percentages may not sum to 100 percent because of rounding.
SOURCE: Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration, National Survey of Substance Abuse Treatment Services (N-SSATS), 2007-2011.

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