Table 3.4 Admissions by primary substance of abuse, according to frequency of use, usual route of administration, and age at first use: TEDS 2007 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	No. of 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	1,817,577	406,038	326,887	246,871	90,516	167,914	66,858	287,933	143,024	897	9,949	4,210	1,502	3,124	992	60,862
Frequency of use
No use in the past month	28.9	26.4	27.5	16.1	19.4	27.8	37.9	37.2	47.3	25.6	20.7	26.6	50.3	42.6	33.9	36.1
1-3 times in the past month	12.6	16.1	12.7	3.5	5.0	11.3	15.7	16.4	15.5	10.9	7.8	9.9	11.7	18.1	19.9	9.8
1-2 times per week	9.2	12.9	10.0	2.6	3.6	9.3	10.6	10.4	9.7	6.4	4.7	6.6	8.8	10.2	10.6	7.0
3-6 times per week	11.9	13.1	13.2	6.7	9.5	15.5	13.1	12.1	11.4	10.6	9.0	14.0	10.3	10.6	13.2	9.4
Daily	37.4	31.5	36.6	71.1	62.5	36.1	22.7	23.9	16.2	46.5	57.7	43.0	18.9	18.4	22.4	37.6
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	1,751,097	401,391	325,109	246,221	89,975	166,953	66,146	286,080	142,330	879	9,876	4,150	1,475	3,110	984	6,418
Usual route of administration
Oral	46.7	99.5	99.6	1.3	71.6	- -	5.3	2.4	4.4	54.5	94.2	90.6	66.5	6.0	9.1	57.7
Smoking	31.9	0.3	0.3	2.3	1.7	100.0	- -	96.6	66.4	35.4	2.1	2.8	19.9	91.4	7.4	14.6
Injection	11.6	0.1	0.1	64.0	10.1	- -	11.3	0.1	18.4	3.5	0.7	3.0	7.6	0.7	1.5	4.3
Inhalation	9.5	0.1	0.1	32.0	15.9	- -	80.7	0.8	9.9	5.5	2.7	3.0	4.2	1.7	80.9	6.9
Other	0.4	0.1	*	0.4	0.8	- -	2.7	0.2	0.8	1.1	0.3	0.6	1.8	0.2	1.1	16.5
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	1,736,882	391,302	320,588	245,696	89,964	167,914	65,733	286,883	142,214	891	9,888	4,156	1,489	3,102	989	6,073
Age at first use
12 years or under	13.2	14.2	23.5	2.9	2.7	2.5	3.4	25.1	5.8	21.3	4.1	4.9	10.8	5.6	20.8	16.2
13 to 14 years	16.4	16.7	24.5	6.5	4.9	4.4	7.3	30.7	12.3	10.5	7.4	10.2	20.4	11.8	29.2	12.0
15 to 16 years	20.9	27.5	26.5	13.0	11.1	9.4	15.4	25.4	17.6	23.5	12.9	15.2	24.7	21.8	19.7	15.8
17 to 18 years	16.6	22.0	15.0	18.6	14.1	13.5	19.2	11.3	17.0	12.9	12.1	11.9	18.0	21.0	9.6	12.2
19 to 20 years	8.3	7.8	4.4	14.0	12.0	11.3	13.0	3.3	10.5	6.2	8.9	7.9	8.2	11.6	6.5	6.5
21 to 25 years	11.8	8.4	4.1	21.4	21.1	23.6	20.9	2.8	16.4	10.4	15.5	15.8	10.2	17.2	4.8	14.7
26 to 30 years	5.8	1.7	1.0	11.4	12.8	15.9	10.4	0.8	9.1	6.5	12.2	8.9	4.8	7.2	1.7	6.9
Over 30 years	6.9	1.7	0.9	12.1	21.4	19.3	10.2	0.6	11.2	8.7	26.9	25.2	2.9	3.9	7.7	15.8
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	100.0
No. of admissions	1,749,201	399,991	325,192	245,772	89,602	167,274	66,254	286,194	142,184	865	9,850	4,163	1,495	3,108	980	6,277
*  Less than 0.05 percent.
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.6.08.