Table 3.4 Admissions by primary substance of abuse, according to frequency of use, usual route of administration, and age at first use: TEDS 2006 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions. See Table 4.2a.]
Frequency of use, usual route of administration, and age at first use	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	1,800,717	393,810	320,222	245,984	74,750	178,475	71,660	289,988	155,643	843	8,011	3,866	1,510	2,777	1,034	52,144
Frequency of use
No use in the past month	28.0	26.4	26.6	15.0	18.6	25.6	33.9	36.0	44.6	38.1	21.7	24.9	50.6	45.4	33.7	31.1
1-3 times in the past month	12.5	15.8	12.6	3.5	4.9	11.0	15.3	16.4	15.6	11.1	8.1	9.9	12.1	16.5	19.3	8.4
1-2 times per week	9.2	12.6	9.9	2.7	3.4	9.5	11.1	10.4	9.7	8.1	5.2	7.5	8.9	9.2	10.4	5.2
3-6 times per week	11.7	13.0	12.9	6.2	9.0	15.5	14.2	11.7	11.4	14.7	8.8	14.0	10.8	9.6	11.6	7.9
Daily	38.6	32.2	38.0	72.5	64.1	38.5	25.5	25.5	18.8	28.0	56.2	43.8	17.6	19.4	24.9	47.5
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	1,729,630	378,467	314,912	244,625	74,180	176,795	70,695	287,247	154,678	839	7,947	3,812	1,474	2,754	1,015	10,190
Usual route of administration
Oral	45.0	98.9	99.1	1.2	71.7	- -	6.6	2.5	4.7	63.2	92.0	92.1	68.7	6.2	6.6	64.9
Smoking	33.2	0.7	0.6	2.2	2.3	100.0	- -	96.2	65.1	24.8	3.5	3.0	17.5	90.1	3.7	12.7
Injection	11.8	0.1	0.1	64.1	11.3	- -	11.4	0.2	18.3	4.5	1.1	2.1	8.0	0.8	3.2	3.6
Inhalation	9.7	0.2	0.1	32.0	14.0	- -	79.5	0.9	10.9	6.7	3.1	2.3	4.3	2.6	84.9	6.7
Other	0.4	0.1	0.1	0.6	0.8	- -	2.4	0.2	0.9	0.8	0.3	0.5	1.4	0.3	1.6	12.2
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	100.0
No. of admissions	1,727,426	376,858	312,983	244,370	74,187	178,475	70,448	288,635	153,862	842	7,964	3,820	1,495	2,725	1,025	9,737
Age at first use
12 years or under	13.2	14.0	23.6	3.2	2.7	3.0	3.5	25.2	5.9	20.0	4.1	4.9	9.1	6.9	27.1	12.5
13 to 14 years	16.5	16.6	24.4	6.7	4.7	4.9	7.3	31.0	12.5	10.1	7.6	8.7	17.7	14.0	25.9	10.2
15 to 16 years	21.0	27.5	27.5	13.1	11.2	9.7	15.5	25.2	17.8	20.6	13.2	13.1	24.8	21.6	18.7	14.6
17 to 18 years	16.3	22.0	14.2	18.2	13.2	13.6	18.8	11.1	16.8	12.5	11.6	12.0	20.0	20.3	9.6	12.6
19 to 20 years	8.3	7.9	4.2	14.1	11.6	11.3	13.1	3.4	10.3	7.9	9.6	8.4	8.9	11.3	6.3	8.3
21 to 25 years	11.8	8.4	4.1	21.0	20.8	22.9	20.6	2.8	16.4	14.5	15.7	15.3	10.8	15.8	3.8	13.5
26 to 30 years	5.9	1.8	1.0	11.6	13.2	15.5	10.5	0.8	9.1	5.7	11.8	11.3	4.2	6.1	3.0	8.2
Over 30 years	7.0	1.9	0.9	12.1	22.7	19.1	10.6	0.6	11.2	8.6	26.3	26.4	4.6	4.0	5.8	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	1,732,122	384,222	314,832	243,703	73,493	177,492	69,215	287,224	154,370	821	7,889	3,803	1,488	2,763	1,024	9,783
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.9.07.