Table 3 Admissions by primary substance of abuse, according to frequency of use, route of administration, age at first use, and number of prior treatment episodes: TEDS 2005 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions. See Table 6a.]
Frequency of use, route of administration, age at first use, and number of prior treatment episodes	All admis- sions	Primary substance at admission
		Alcohol		Opiates		Cocaine		Mari- juana/ hashish	Stimulants		Tran- quil- izers	Seda- tives	Hallu- cino- gens	PCP	Inhal- ants	Other/ none speci- fied
		Alcohol only	With secondary drug	Heroin	Other opiates	Smoked cocaine	Other route		Metham- phetamine/ amphet- amine	Other stimu- lants
Total	1,849,548	398,656	324,990	254,345	67,887	185,236	71,255	292,250	169,489	981	8,039	4,361	2,057	2,807	1,372	65,823
Frequency of use
No use in the past month	27.3	26.4	26.9	14.1	19.9	24.9	33.0	35.4	38.9	31.6	20.3	28.6	52.2	46.4	31.9	35.1
1-3 times in the past month	11.9	15.0	12.4	2.9	4.8	10.7	14.6	16.6	13.0	12.1	8.0	8.9	11.5	13.2	16.3	8.2
1-2 times per week	8.8	12.1	9.7	2.2	3.4	9.2	11.1	10.1	8.5	9.1	4.8	6.2	7.0	8.2	7.5	6.5
3-6 times per week	11.4	12.6	12.2	5.7	8.6	15.0	14.3	11.8	11.7	14.4	9.1	11.5	9.5	10.5	13.2	8.8
Daily	40.5	33.9	38.7	75.2	63.3	40.2	27.0	26.1	27.9	32.7	57.8	44.8	19.8	21.6	31.1	41.4
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	100.0
No. of admissions	1,760,677	383,852	319,096	252,850	67,302	182,808	69,825	288,426	167,845	963	7,920	4,312	2,023	2,774	1,352	9,329
Route of administration
Oral	44.3	99.3	99.5	1.2	71.8	- -	5.0	2.0	4.6	53.6	93.0	89.7	59.2	6.3	4.0	53.3
Smoking	33.5	0.4	0.3	2.2	1.9	100.0	- -	96.9	62.9	32.4	3.0	2.8	29.8	89.4	5.5	17.5
Inhalation	11.9	0.1	0.1	32.9	13.1	- -	80.6	0.8	12.4	6.8	2.6	3.1	4.2	2.7	87.6	6.2
Injection	9.8	0.1	0.1	63.0	12.2	- -	11.4	0.1	18.9	6.8	1.1	3.8	6.0	1.0	1.5	3.1
Other	0.5	0.1	0.1	0.7	0.9	- -	3.1	0.2	1.2	0.4	0.3	0.6	0.7	0.6	1.3	20.0
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	100.0
No. of admissions	1,751,849	379,783	313,783	252,332	67,312	185,236	67,748	289,996	167,024	970	7,907	4,315	2,025	2,752	1,368	9,298
Age at first use
12 years or under	13.4	13.9	23.4	3.2	2.8	3.2	4.0	24.9	5.0	14.4	4.7	4.8	9.7	6.1	22.2	19.0
13 to 14 years	16.3	16.2	24.1	6.6	4.5	4.9	7.2	30.8	11.3	15.2	7.4	7.8	17.8	14.1	27.3	10.2
15 to 16 years	21.3	27.5	27.6	13.3	10.2	9.8	15.3	25.3	18.1	19.3	13.3	12.8	26.5	21.1	20.2	15.3
17 to 18 years	16.4	22.5	14.3	17.7	12.7	13.3	18.8	11.4	17.4	14.3	10.8	11.7	18.2	22.6	9.6	11.7
19 to 20 years	8.2	7.8	4.3	13.8	11.7	11.3	13.0	3.4	10.9	10.2	9.6	9.4	9.2	12.1	6.0	7.4
21 to 25 years	11.5	8.3	4.2	20.5	20.5	23.0	20.8	2.9	16.7	10.3	15.3	15.7	9.9	14.7	4.8	12.7
26 to 30 years	5.8	1.8	1.1	11.9	13.7	15.7	10.5	0.8	9.3	6.4	11.9	11.6	3.9	5.6	3.8	7.4
Over 30 years	7.0	2.0	1.0	13.0	23.9	18.9	10.4	0.6	11.3	10.0	27.1	26.2	4.9	3.7	6.0	16.4
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	100.0
No. of admissions	1,583,637	370,734	299,937	223,801	63,553	168,544	64,530	263,144	103,073	862	7,608	3,956	1,833	2,063	996	9,003
No. of prior treatment episodes
None	46.2	51.4	42.0	25.5	43.6	37.3	45.8	59.6	52.5	50.6	43.5	56.4	50.2	44.8	57.9	71.8
1	22.1	21.3	22.7	18.9	24.0	22.1	23.6	23.6	24.9	22.3	23.0	19.7	24.8	23.7	19.1	13.2
2	11.6	10.3	12.8	14.6	13.1	14.0	12.8	8.9	11.2	12.8	12.2	9.7	11.4	13.8	9.7	5.3
3	6.5	5.5	7.4	10.0	7.3	8.8	6.9	3.5	5.3	5.0	6.6	5.4	6.1	7.1	4.8	2.7
4	3.7	3.0	4.2	6.7	3.8	5.1	3.7	1.5	2.4	2.3	3.4	2.5	2.8	3.6	2.6	1.4
5 or more	9.9	8.5	10.9	24.3	8.2	12.6	7.2	2.8	3.7	7.0	11.3	6.2	4.7	7.0	6.0	5.6
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	100.0
No. of admissions	1,423,672	305,806	230,042	196,650	57,180	146,775	55,524	237,796	146,959	813	6,415	3,530	1,669	2,466	1,206	30,841
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.3.06.