Table 1. Demographics and recent drug use of PWIDs in ZIP Codes with 10 or more PWIDs and less than 10 PWIDs who entered Beth Israel/Mount Sinai drug treatment from 2011–2015 (N = 910).

	Zips of 10 or more PWID		Zips of <10 PWID		All Zips
Average N per Zip Code	17		2		4
Average Age (SD)	41 (9.9)		38 (10.7)		40 (10.4)
	N	%	N	%	N	%
Total	482	100.0	428	100.0	910	100
Gender
Male	402	83.4	335	78.3	737	81.0
Female	80	16.6	93	21.7	173	19.0
Race/ethnicity*
White	116	24.1	193	45.1	309	34.0
African-American	75	15.6	60	14.0	135	14.8
Latinx	281	58.3	145	33.9	426	46.8
Other	10	2.0	30	7.0	40	4.4
Age groups
18–22	15	3.1	22	5.1	37	4.1
23–27	30	6.2	60	14.0	90	9.9
28–32	54	11.2	72	16.8	126	13.8
33–37	73	15.1	61	14.3	134	14.7
38–42	76	15.8	61	14.3	137	15.1
43–47	95	19.7	59	13.8	154	16.9
48–52	74	15.4	50	11.7	124	13.6
53–57	47	9.8	29	6.8	76	8.4
58–62	13	2.7	10	2.3	23	2.5
63–67	4	0.8	1	0.2	5	0.5
68–72	1	0.2	2	0.5	3	0.3
73–77	0	0.0	1	0.2	1	0.1
Injected heroin	456	94.8	414	96.7	870	95.7
Injected cocaine	188	39.1	171	40.1	359	39.6
Injected speedball	174	36.1	163	38.2	337	37.1
Smoked cocaine	182	37.8	187	43.7	369	40.6
Daily injection	346	71.8	313	73.1	659	72.4
HIV+*	41	9.8	16	4.2	57	7.2
HCV+*	277	66.4	216	57.0	493	61.9
ART among HIV+	26/41	63.4	10/16	62.5	36/57	63.2
HIV- with receptive sharing	68	14.2	71	16.9	139	15.5
HIV+ with distributive sharing	4	0.8	1	0.2	5	0.6
HCV- with receptive sharing	20	4.2	28	6.7	48	5.3
HCV+ with distributive sharing	42	8.9	34	8.0	76	8.5

* statistically significant differences, p < 0.05 by Fisher’s exact test