Table 2.5. Admissions aged 12 and older, by age of first use and number of prior treatment episodes according to primary substance of abuse: 2011
Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions.]
Age of first use and number of prior treatment episodes All admis-
sions
Primary substance at admission
Alcohol Opiates Cocaine Mari-
juana/
hashish
Metham-
phetamine/
amphet-
amines
Tran-
quil-
izers
Seda-
tives
Hallu-
cino-
gens
PCP Inhal-
ants
Other/
none
speci-
fied
Alcohol
only
With second-ary
drug
Heroin Other
opiates
Smoked
cocaine
Other
route
Age of first use1            
12 years or under  12.9  13.9  22.0   2.1   2.7   2.2   3.5  24.7   6.2   3.6   4.7   7.0   4.0  15.5  19.7
13 to 14 years  16.6  17.0  23.9   5.7   5.8   4.3   7.1  31.6  12.7   7.5   7.9  15.4  10.5  20.5   9.5
15 to 16 years  21.0  27.3  27.0  12.4  12.9   9.3  14.9  25.3  17.9  14.4  13.9  22.9  19.7  18.8  14.3
17 to 18 years  16.7  21.6  15.3  19.0  15.8  13.8  18.9  11.3  18.2  13.9  12.4  18.4  20.9   9.9  15.2
19 to 20 years   8.6   7.7   4.8  15.0  12.9  11.7  13.3   3.2  10.1  10.2   9.9  11.3  13.2   4.6   8.4
21 to 25 years  12.3   8.9   4.9  23.2  22.0  25.0  21.4   2.7  15.9  15.7  14.9  11.5  18.9   8.8  13.4
26 to 30 years   5.7   1.8   1.1  12.1  12.3  16.5  10.6   0.7   8.7  11.8  11.6   6.2   7.8   5.0   7.7
Over 30 years   6.1   1.9   1.0  10.5  15.7  17.1  10.2   0.5  10.3  23.0  24.6   7.2   4.9  16.9  11.8
Total  100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
No. of admissions  1,816,670 397,959 323,444 277,462 185,889  99,119  44,048 331,931 110,204 17,787 3,623 1,810 5,751 1,196 16,447
No. of prior treatment episodes            
None  41.1  47.3  35.6  19.8  43.5  26.1  37.0  57.6  41.7  40.6  53.0  45.6  29.4  46.9  55.7
1  21.9  20.5  21.7  20.1  24.0  20.6  23.2  23.2  25.2  20.1  21.8  22.7  26.3  24.0  18.1
2  12.4  10.6  13.4  15.0  13.0  15.3  14.4   9.8  13.9  12.0  10.4  12.1  17.7  12.5   8.7
3   7.4   5.8   8.4  11.0   7.3  10.9   8.9   4.4   7.5   7.2   6.0   5.9  10.8   6.4   4.8
4   4.3   3.5   5.1   6.9   4.0   7.1   4.9   2.0   4.3   4.5   2.5   3.9   5.8   3.3   2.9
5 or more  13.0  12.4  15.8  27.3   8.2  20.0  11.6   3.0   7.4  15.6   6.4   9.9  10.1   6.9   9.8
Total  100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
No. of admissions  1,689,338 358,710 283,553 250,073 174,321  91,992  41,564 323,392 109,129 15,283 3,484 1,751 5,603 1,156 29,327
1 For drugs other than alcohol, this is the age at which the client first used the substance. For alcohol, this is the age at first intoxication.
SOURCE: Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.15.12.

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