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 2000 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	1,599,703	413,638	310,558		243,523	25,839		158,524	59,787	236,638	81,764	1,119	5,198	3,213	2,867	2,589	1,251	53,195
Frequency of use
No use in the past month	25.3	26.4	26.7		10.5	15.3		23.6	33.1	32.6	32.6	30.3	18.8	23.0	44.6	29.6	31.6	44.8
1-3 times in the past month	11.7	15.1	13.2		2.3	4.6		9.8	13.7	15.2	11.0	10.9	7.8	8.2	15.2	14.4	15.8	7.1
1-2 times per week	9.2	11.7	10.8		1.9	3.1		10.0	11.4	10.5	8.1	8.9	4.9	5.1	13.1	11.3	10.8	7.1
3-6 times per week	10.9	10.8	12.4		4.6	7.8		15.3	13.5	12.1	11.4	13.8	9.0	11.5	12.7	11.7	13.8	7.6
Daily	43.0	36.1	36.9		80.7	69.3		41.3	28.3	29.7	36.9	36.1	59.5	52.1	14.4	33.0	27.9	33.4
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	1,463,681	385,363	290,985		222,733	24,613		154,812	49,977	227,557	80,379	1,068	5,001	2,973	2,711	2,380	1,192	11,937
Route of administration
Oral	50.2	99.0	99.0		1.6	76.4		- -	12.4	3.6	11.1	44.4	95.3	90.6	84.4	8.0	3.5	56.7
Smoking	28.6	0.4	0.4		3.0	3.7		100.0	- -	95.2	39.8	39.1	1.7	3.4	8.4	85.9	2.0	17.0
Inhalation	8.4	0.1	0.1		29.9	4.4		- -	70.3	0.8	21.1	7.6	1.4	2.2	4.1	4.0	90.6	2.5
Injection	12.2	0.1	0.2		64.6	14.8		- -	14.5	0.1	27.2	5.9	1.2	3.3	1.3	1.5	0.4	3.3
Other	0.6	0.4	0.2		0.8	0.6		- -	2.8	0.3	0.8	2.9	0.4	0.5	1.8	0.7	3.5	20.5
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	1,485,908	395,822	294,205		225,640	24,859		158,524	50,378	230,609	79,648	1,086	5,057	3,022	2,740	2,434	1,212	10,672
Age at first use
12 years or under	16.2	16.5	26.6		3.4	4.1		3.8	4.7	26.1	6.0	14.9	5.9	5.5	11.8	9.5	26.0	42.1
13 to 14 years	16.7	15.8	24.5		6.7	5.2		4.8	6.8	29.9	11.1	14.7	7.7	7.9	23.3	15.3	29.7	9.6
15 to 16 years	21.0	26.4	25.8		12.7	9.1		9.3	14.0	24.5	17.1	18.4	11.5	11.6	28.0	26.2	18.9	13.1
17 to 18 years	15.9	21.4	13.1		17.0	10.4		12.8	17.4	11.4	16.5	14.4	10.5	9.6	18.1	20.5	9.4	9.9
19 to 20 years	7.5	7.5	3.9		12.8	9.5		10.7	12.5	3.6	11.0	7.9	9.7	9.4	7.1	11.8	4.7	5.2
21 to 25 years	10.7	8.1	3.7		20.3	18.1		23.7	21.4	3.0	17.3	12.6	13.6	16.7	7.7	9.5	4.6	7.1
26 to 30 years	5.7	1.9	1.1		13.4	15.7		17.0	11.8	0.8	10.5	7.8	13.1	13.3	2.3	3.9	2.7	4.6
Over 30 years	6.3	2.3	1.2		13.8	27.9		17.9	11.5	0.7	10.5	9.2	28.0	26.0	1.5	3.1	3.9	8.5
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	1,341,268	375,120	278,932		183,030	22,817		137,395	52,384	213,545	48,348	990	4,708	2,758	2,555	1,655	1,167	15,864
No. of prior treatment episodes
None	44.4	51.1	38.9		22.1	40.0		36.7	40.8	61.5	53.5	55.3	44.6	48.5	53.8	49.2	54.3	72.9
1	21.7	19.9	22.3		20.8	23.5		23.6	24.0	22.8	25.0	22.8	20.2	23.3	23.0	23.9	21.0	13.1
2	11.6	9.4	13.1		14.9	13.7		14.8	14.4	8.4	11.0	9.4	11.4	11.0	11.4	13.7	8.1	5.2
3	6.7	5.0	8.1		10.1	7.9		8.9	8.7	3.4	4.7	3.5	6.7	6.1	5.0	5.7	5.0	2.4
4	3.8	2.8	4.5		6.7	4.4		5.1	3.9	1.4	2.3	2.8	3.7	3.8	2.4	2.5	2.2	1.3
5 or more	11.8	11.8	12.9		25.4	10.4		10.9	8.3	2.4	3.6	6.2	13.4	7.3	4.4	4.9	9.4	5.1
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	1,385,843	354,718	268,987		214,102	22,691		145,985	49,754	208,241	71,841	917	4,648	2,821	2,501	2,398	1,122	35,117
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS) - 4.1.02.