Table 3 Admissions by primary substance of abuse, according to frequency of use, route of administration, age at first use, and prior treatment: TEDS 2002 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions.]
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	1,882,584	444,781	363,158	285,667	45,605	176,014	65,685	283,527	124,755	1,308	8,209	4,493	2,795	3,854	1,199	71,534
Frequency of use
No use in the past month	25.3	25.3	26.4	10.6	16.5	22.7	31.5	34.6	35.8	29.6	18.5	24.4	47.7	32.9	31.6	38.0
1-3 times in the past month	11.3	13.9	11.7	2.3	4.4	10.0	15.0	16.1	12.2	14.6	8.9	10.7	11.2	15.5	16.9	8.1
1-2 times per week	8.8	11.2	9.9	1.9	3.0	9.8	11.6	10.4	8.7	11.8	5.9	6.3	8.4	11.3	11.5	7.8
3-6 times per week	10.5	10.6	11.2	4.8	7.9	15.2	12.9	11.6	11.2	10.5	8.4	11.9	10.9	11.5	11.8	8.8
Daily	44.1	39.0	40.8	80.3	68.3	42.3	29.0	27.3	32.1	33.4	58.3	46.6	21.8	28.7	28.2	37.4
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	1,730,486	421,533	343,188	263,739	43,856	172,814	57,897	274,564	122,417	1,199	7,899	4,178	2,608	3,422	1,141	10,031
Route of administration
Oral	48.1	98.9	98.6	1.8	74.6	- -	10.0	2.7	7.4	51.4	92.3	85.0	77.8	7.8	5.5	57.4
Smoking	30.1	0.6	0.8	2.5	2.7	100.0	- -	95.9	50.6	32.0	3.8	7.7	9.8	87.2	3.4	21.1
Inhalation	9.2	0.1	0.2	32.9	8.6	- -	72.6	0.9	17.1	8.0	1.6	2.5	4.3	3.1	88.3	3.0
Injection	12.0	0.1	0.2	61.9	12.9	- -	13.7	0.2	23.4	5.5	1.4	4.0	6.7	1.1	1.8	3.1
Other	0.7	0.3	0.3	0.9	1.2	- -	3.7	0.3	1.5	3.2	0.9	0.8	1.4	0.7	1.0	15.4
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	1,740,613	423,571	343,609	265,433	44,067	176,014	57,514	277,461	123,020	1,279	7,616	4,111	2,632	3,636	1,170	9,480
Age at first use
12 years or under	15.1	15.6	24.7	3.2	4.0	3.6	4.4	25.8	6.9	14.8	7.1	12.7	10.1	6.6	26.6	27.0
13 to 14 years	16.6	16.1	23.8	6.5	4.3	5.0	6.8	30.5	11.5	17.1	7.3	7.8	19.0	14.7	28.4	11.8
15 to 16 years	21.1	26.6	27.1	12.5	9.1	9.5	14.0	24.6	17.7	18.0	12.0	12.2	24.6	23.8	18.0	15.7
17 to 18 years	15.9	21.5	13.7	16.8	10.6	13.0	17.8	11.2	16.6	12.9	10.7	9.9	18.5	22.3	9.7	11.0
19 to 20 years	7.7	7.7	4.1	13.0	9.9	10.6	12.9	3.4	10.6	10.7	8.6	8.1	8.8	11.5	3.6	6.3
21 to 25 years	10.9	7.9	4.0	20.3	18.7	23.6	21.1	2.9	16.7	12.9	13.8	13.5	10.2	13.6	4.3	9.7
26 to 30 years	5.9	2.0	1.2	13.2	15.0	16.5	11.3	0.8	9.7	6.3	11.9	11.1	4.2	4.7	2.9	6.2
Over 30 years	6.9	2.5	1.2	14.4	28.5	18.1	11.8	0.7	10.4	7.3	28.5	24.7	4.6	2.9	6.5	12.3
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	1,575,148	409,529	328,458	234,354	41,665	154,093	59,637	253,421	65,913	1,150	7,350	3,891	2,498	2,324	1,125	9,740
Number of prior treatment episodes
None	44.4	50.3	38.6	22.4	40.7	35.3	40.5	60.3	51.9	55.6	43.3	45.8	50.1	44.9	52.6	75.0
1	22.5	21.3	23.0	20.8	24.9	23.8	25.2	23.4	26.3	21.6	24.3	23.9	24.4	27.0	19.0	12.4
2	12.0	10.3	13.5	15.5	13.5	15.0	13.8	8.8	11.3	10.5	12.0	12.7	11.1	14.6	10.8	4.7
3	6.8	5.6	8.1	10.2	7.8	9.3	7.7	3.6	4.9	4.3	6.3	5.8	5.8	5.6	5.7	2.3
4	3.7	3.0	4.5	6.4	4.1	5.1	4.1	1.5	2.3	3.2	3.6	3.5	3.5	2.9	4.0	1.2
5 or more	10.6	9.6	12.3	24.6	9.1	11.4	8.7	2.4	3.3	4.8	10.5	8.3	5.1	5.0	7.8	4.4
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	1,563,411	365,823	287,640	229,839	38,757	157,623	54,052	253,398	112,510	1,177	5,851	3,437	2,318	3,554	1,062	46,370
- -  Quantity is zero.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS) - 3.1.04.