Table 1.

Characteristics of subjects assessed at substance abuse treatment sites for STIs between April and December 2001

Characteristic	Total	By program
N	551 %	Detoxa 484 %	MMb 67 %
Gender
Female	32	30	51
Male	68	70	49
Age (mean years)	37.4	36.8	41.7
Race/ethnicityc
White	35	34	43
Black or African–American	34	33	37
Hispanic	27	28	17
American Indian or Alaskan native	3	3	3
Native Hawaiian or Asian/Pacific Islander	2	2	0
Primary drug of choicec
Alcohol	19	21	3
Heroin	65	61	94
Cocaine	11	12	3
Marijuana	2	2	0
Sedatives	0.7	1	0
Other	3	4	0
Total income, all sourcesd
<$10 000	42	39	60
$10 000–19 999	13	12	13
$20 000+	46	48	27
Formal educationd
<12 years	33	33	31
12 years	41	40	48
13 years or more	26	27	21

^aDetoxification center.

^bMethadone Maintenance Program.

^cEighteen missing values.

^dTen missing values.