Table 3.3 Admissions by primary substance of abuse, according to frequency of use, route of administration, age at first use, and prior treatment: TEDS 2001 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions. See Table 4.2.]
Frequency of use, route of administration, age at first use, and prior treatment	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	1,739,796	421,209	348,591	275,672	36,347	163,988	61,387	255,394	98,332	1,395	7,074	3,737	3,121	3,116	1,234	59,199
Frequency of use
No use in the past month	23.9	24.9	24.7	9.5	15.1	22.4	30.5	32.1	33.2	27.9	16.5	23.3	43.9	33.7	29.6	42.0
1-3 times in the past month	10.9	13.7	11.3	2.2	4.4	9.9	15.0	15.8	11.2	10.6	7.0	8.2	13.2	14.6	15.7	7.2
1-2 times per week	8.8	11.1	10.1	1.8	3.0	9.8	11.4	10.5	8.2	9.6	4.6	5.6	11.0	11.4	10.8	6.8
3-6 times per week	10.7	10.9	11.7	4.7	7.9	15.4	13.4	12.1	11.4	15.2	8.0	11.1	11.4	11.4	14.6	8.0
Daily	45.7	39.4	42.3	81.8	69.7	42.6	29.7	29.5	36.0	36.7	63.9	51.8	20.5	28.9	29.4	35.9
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	1,603,411	396,350	330,650	254,073	34,783	160,349	52,714	246,736	96,437	1,246	6,825	3,526	2,915	2,802	1,181	12,824
Route of administration
Oral	49.5	99.0	98.8	2.0	75.6	- -	11.8	2.9	9.5	41.3	94.5	90.1	82.9	7.8	4.3	50.9
Smoking	28.5	0.4	0.5	2.5	3.0	100.0	- -	95.8	45.2	43.8	2.4	2.7	8.9	86.7	2.6	21.3
Inhalation	9.1	0.1	0.2	33.1	7.3	- -	70.5	0.8	18.5	7.8	1.5	2.5	3.8	3.8	90.2	2.7
Injection	12.1	0.2	0.2	61.5	13.2	- -	13.9	0.2	25.5	3.5	1.1	4.0	2.8	1.3	1.2	4.1
Other	0.7	0.3	0.3	0.9	0.9	- -	3.8	0.4	1.2	3.7	0.6	0.8	1.6	0.4	1.8	21.1
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	1,625,303	405,275	334,360	257,347	35,078	163,988	52,648	249,785	96,158	1,353	6,879	3,577	2,924	2,914	1,214	11,803
Age at first use
12 years or under	15.2	15.5	24.8	3.2	3.8	3.7	4.3	25.7	5.9	16.3	5.6	6.0	10.2	7.4	26.6	37.5
13 to 14 years	16.7	16.1	24.1	6.8	4.5	5.0	7.0	30.5	11.3	14.5	7.2	7.4	20.5	16.0	28.4	9.2
15 to 16 years	21.2	26.7	26.9	12.8	8.5	9.6	14.0	24.5	17.8	18.0	10.9	11.1	26.2	24.0	17.9	13.5
17 to 18 years	15.8	21.4	13.5	16.9	10.1	12.9	17.5	11.2	16.9	14.1	8.9	11.0	17.1	20.8	8.9	8.8
19 to 20 years	7.7	7.8	4.2	12.7	9.7	10.8	12.5	3.5	10.7	8.0	8.3	9.4	8.3	10.7	4.5	5.1
21 to 25 years	10.8	7.9	3.9	20.3	18.3	23.4	21.3	3.0	16.7	11.3	13.8	15.2	8.5	14.4	4.9	6.8
26 to 30 years	5.9	2.1	1.2	13.1	15.2	16.6	11.7	0.9	10.1	6.6	13.2	12.0	4.1	4.2	2.2	4.5
Over 30 years	6.8	2.5	1.4	14.2	29.8	18.0	11.6	0.7	10.6	11.2	32.1	28.0	5.1	2.6	6.6	14.6
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	1,483,920	386,459	318,818	224,865	32,899	144,048	55,106	230,697	58,239	1,243	6,573	3,310	2,845	1,956	1,129	15,733
No. of prior treatment episodes
None	44.3	50.6	39.1	21.7	40.8	35.8	39.8	61.2	53.5	59.2	44.0	48.8	53.3	44.5	52.5	71.9
1	21.4	20.1	22.3	20.0	24.4	22.7	23.9	22.2	25.1	19.7	23.1	22.4	23.6	24.1	17.9	13.4
2	11.6	9.7	13.0	14.8	13.1	14.8	14.8	8.4	11.0	7.9	10.7	10.9	10.1	13.3	9.2	5.2
3	6.6	5.1	7.9	9.9	7.4	8.9	8.7	3.5	4.7	4.1	6.2	7.0	5.2	5.7	4.7	2.5
4	3.7	2.9	4.5	6.6	4.2	5.0	4.0	1.5	2.3	2.3	3.8	3.1	2.3	3.1	3.0	1.3
5 or more	12.3	11.6	13.2	27.0	10.1	12.8	8.8	3.2	3.4	6.7	12.0	7.8	5.4	9.3	12.7	5.8
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	1,433,375	343,048	271,195	221,828	30,616	145,089	49,622	225,118	85,843	1,170	5,267	3,038	2,667	2,840	1,109	44,925
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS) - 5.31.03.