Table 3.4 Admissions by primary substance of abuse, according to frequency of use, usual route of administration, and age at first use: TEDS 2004 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	1,875,026	416,510	336,954	265,895	63,243	184,949	71,438	298,317	150,402	1,007	8,558	4,487	2,408	3,272	1,209	66,377
Frequency of use
No use in the past month	26.8	26.9	26.9	12.9	18.7	23.4	32.7	35.0	37.3	34.1	18.9	26.6	51.5	41.9	35.1	39.8
1-3 times in the past month	11.7	14.8	12.1	2.6	4.8	10.6	14.6	16.5	12.3	10.8	8.0	9.1	12.0	12.5	15.0	8.8
1-2 times per week	9.1	12.2	10.0	2.1	3.2	9.8	11.7	10.3	8.6	8.8	5.2	6.4	8.0	9.8	9.1	7.2
3-6 times per week	10.8	11.7	11.5	4.7	8.3	14.8	13.4	11.5	11.4	9.8	7.9	10.0	8.7	9.6	12.8	8.8
Daily	41.5	34.3	39.5	77.6	65.1	41.3	27.6	26.7	30.3	36.5	59.9	47.9	19.8	26.2	27.9	35.4
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	1,723,266	384,731	314,147	246,382	60,997	182,746	64,637	291,259	149,006	962	8,289	4,319	2,286	3,051	1,160	9,294
Usual route of administration
Oral	44.6	99.2	99.3	1.8	73.1	- -	6.7	2.4	4.9	53.2	92.6	88.3	61.1	6.5	5.4	50.1
Smoking	33.5	0.4	0.4	2.3	2.1	100.0	- -	96.7	59.1	34.1	3.3	3.5	29.1	88.8	4.1	17.8
Injection	11.9	0.1	0.1	62.8	11.8	- -	12.5	0.1	21.1	3.9	1.1	4.2	5.5	1.4	1.9	3.0
Inhalation	9.5	0.2	0.1	32.4	12.2	- -	77.7	0.7	13.6	7.8	2.7	2.9	3.8	3.0	87.7	5.0
Other	0.6	0.1	0.1	0.8	0.9	- -	3.1	0.2	1.3	1.0	0.3	1.0	0.6	0.3	0.9	24.1
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	1,706,903	377,344	303,173	247,234	61,068	184,949	62,858	293,229	148,276	983	8,328	4,342	2,285	3,065	1,173	8,596
Age at first use
12 years or under	13.6	13.8	23.5	3.2	3.3	3.3	3.8	24.9	5.4	11.7	5.4	4.7	11.6	6.6	25.4	20.4
13 to 14 years	16.3	15.8	23.9	6.4	4.6	5.1	6.8	30.8	11.6	14.4	7.4	8.4	19.5	14.1	28.5	12.7
15 to 16 years	21.2	27.3	27.4	12.8	10.2	9.9	14.9	25.1	18.3	18.7	12.9	13.2	24.8	20.5	20.9	15.6
17 to 18 years	16.3	22.6	14.3	17.2	11.9	13.1	18.4	11.3	17.1	16.1	10.9	11.6	16.6	22.5	8.1	12.3
19 to 20 years	8.1	7.8	4.3	13.4	11.0	11.0	12.9	3.4	10.7	9.8	8.7	9.7	10.0	12.7	4.7	7.0
21 to 25 years	11.4	8.2	4.1	20.5	19.7	22.8	21.0	2.9	16.6	11.5	14.3	14.8	9.2	15.4	5.2	10.9
26 to 30 years	6.0	2.0	1.1	12.5	13.9	16.1	10.8	0.9	9.4	7.5	12.3	11.9	3.8	5.1	2.0	6.8
Over 30 years	7.3	2.4	1.3	14.0	25.4	18.8	11.3	0.7	10.9	10.3	28.2	25.7	4.5	3.2	5.2	14.2
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	1,592,935	379,679	302,635	231,027	59,177	166,383	66,561	270,946	89,244	881	8,131	4,008	2,211	2,328	1,055	8,669
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 2.1.06.