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: 2009 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	13.8	14.7	22.9	2.4	4.1	2.5	4.5	24.8	6.3	5.6	5.8	9.3	4.6	15.5	11.7
13 to 14 years	16.8	16.7	24.0	5.7	5.7	4.3	7.0	31.1	12.7	8.0	9.0	17.7	11.7	21.2	10.5
15 to 16 years	21.3	27.1	26.8	12.4	12.3	9.8	14.9	25.3	18.3	14.9	14.4	26.3	20.1	16.7	17.1
17 to 18 years	16.8	21.8	15.3	19.0	15.4	13.7	18.7	11.4	16.7	13.3	12.2	18.7	21.3	11.9	14.8
19 to 20 years	8.3	7.8	4.5	14.8	12.1	11.6	13.3	3.3	10.2	9.5	9.1	9.5	12.0	8.2	9.7
21 to 25 years	11.8	8.6	4.6	22.5	21.5	24.2	21.1	2.8	16.3	15.6	16.1	9.8	17.8	8.6	14.9
26 to 30 years	5.4	1.7	1.1	11.8	12.0	16.0	10.4	0.7	9.0	10.8	11.1	4.4	8.2	6.0	8.1
Over 30 years	6.0	1.7	0.9	11.3	16.9	18.0	10.1	0.5	10.6	22.4	22.4	4.3	4.3	12.0	13.2
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	1,920,196	456,669	356,318	281,521	137,292	130,966	51,359	350,912	114,291	14,249	4,975	1,761	4,383	1,506	13,994
No. of prior treatment episodes
None	43.2	48.7	38.1	23.1	43.0	30.7	41.7	58.1	44.9	38.1	58.9	47.6	35.6	55.8	65.3
1	21.3	20.4	21.4	19.2	24.2	20.5	22.2	22.5	24.1	21.0	18.5	23.6	24.3	21.3	15.2
2	12.1	10.4	13.3	14.1	13.5	14.7	13.8	10.0	13.8	12.8	8.6	12.2	15.2	10.7	6.6
3	7.0	5.6	8.1	10.4	7.1	10.0	7.8	4.1	7.0	7.4	5.0	6.2	10.0	3.5	3.4
4	4.0	3.3	4.7	6.4	3.9	6.1	4.2	1.9	3.8	4.5	2.8	3.2	4.8	2.6	1.8
5 or more	12.4	11.6	14.4	26.8	8.3	18.0	10.3	3.4	6.4	16.3	6.1	7.3	10.2	6.1	7.8
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	1,785,919	413,266	311,774	252,321	128,881	122,400	48,440	339,462	111,443	12,183	4,799	1,719	4,303	1,481	33,447
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 11.03.10.