Table 3.7 Heroin admissions aged 12 and older receiving medication-assisted opioid therapy,¹ by usual route of administration and age group: TEDS 1998-2008 Percent distribution
[Based on administrative data reported to TEDS by all reporting States and jurisdictions.]
Usual route of administration and age group	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Total heroin admissions	246,788	257,208	269,967	277,243	284,200	273,567	261,312	259,630	265,962	248,061	267,335
Percentage of heroin admissions receiving medication-assisted opioid therapy	39.7	38.5	36.6	35.6	35.1	32.4	31.1	30.1	29.7	29.1	30.2
Usual route of administration
Injection	45.8	44.8	42.7	40.7	38.9	35.2	33.2	30.8	29.4	29.0	30.4
Inhalation	32.3	29.5	29.1	31.0	32.2	30.4	28.4	28.5	30.2	28.7	29.9
Smoking	48.3	49.7	47.0	39.2	39.2	37.3	38.1	35.8	33.6	34.4	29.5
Other	25.0	25.4	20.1	21.1	23.1	23.0	31.8	26.7	26.3	23.1	24.2
No. of admissions	224,375	234,868	250,737	257,451	264,173	251,830	237,855	252,070	258,056	235,369	229,910
Age group
12 to 19 years	14.1	14.7	16.1	15.4	15.1	13.7	12.0	11.2	11.5	13.1	11.8
20 to 34 years	32.0	30.8	28.8	28.7	28.1	26.0	24.8	23.6	22.9	22.6	23.5
35 to 44 years	43.7	41.9	39.3	38.0	37.1	33.8	32.3	31.4	30.3	29.9	31.7
45 years and older	54.3	52.7	50.5	48.4	47.6	44.0	43.1	42.1	42.3	40.5	41.5
No. of admissions	241,734	251,807	268,308	275,551	282,771	269,787	255,903	254,004	259,686	236,464	230,918
¹Medication-assisted opioid therapy with methadone or buprenorphine as part of the client's treatment.
SOURCE: Office of Applied Studies, Substance Abuse and Mental Health Services Administration, Treatment Episode Data Set (TEDS). Data received through 10.6.08.