TABLE 4.

Injecting risk behaviors in the past 30 days among drug injectors in Newark, NJ and New York City, by city of recruitment, 2004–2006

	Total, N (%)	Newark, N (%)	NYC, N (%)	OR (95% CI)	AOR (95% CI)a	p value
Total	526 (100)	214 (40.7)	312 (59.3)
Injected with a used syringe from another injector
No	460 (87.5)	173 (80.8)	287 (92.0)	2.72 (1.60–4.63)	2.32 (1.07–5.04)	0.0337
Yes	66 (12.5)	41 (19.2)	25 (8.0)
Reused own syringe
No	403 (76.6)	133 (62.1)	270 (86.5)	3.91 (2.56–6.00)	2.99 (1.63–5.50)	0.0004
Yes	123 (23.4)	81 (37.9)	42 (13.5)
Did not always inject once only with a new, sterile syringe that had been sealed in a wrapper
No	147 (27.9)	22 (10.3)	125 (40.1)	5.79 (3.52–9.50)	5.43 (2.86–10.30)	<0.0001
Yes	379 (72.1)	192 (89.7)	187 (59.9)
Receptive syringe Sharing
No	398 (75.7)	150 (70.1)	248 (79.5)	1.65 (1.11–2.47)	1.54 (0.86–2.79)	0.1497
Yes	128 (24.3)	64 (29.9)	64 (20.5)
Distributive syringe sharing
No	386 (73.4)	149 (69.6)	237 (76.0)	1.38 (0.93–2.04)	1.64 (0.91–2.94)	0.0973
Yes	140 (26.6)	65 (30.4)	75 (24.0)
Shared cooker/filter/rinse water
No	318 (60.5)	121 (56.5)	197 (63.1)	1.32 (0.92–1.88)	1.08 (0.65–1.82)	0.7590
Yes	208 (39.5)	93 (43.5)	115 (36.9)
Receptive syringe-mediated drug sharing
No	436(82.9)	168 (78.5)	268 (85.9)	1.67 (1.06–2.63)	1.43 (0.73–2.81)	0.2980
Yes	90 (17.1)	46 (21.5)	44 (14.1)
Distributive syringe-mediated drug sharing
No	442 (84.0)	175 (81.8)	267 (85.6)	1.32 (0.83–2.11)	1.07 (0.53–2.17)	0.8376
Yes	84 (16.0)	39 (18.2)	45 (14.4)

^aAOR adjusted by age, race/ethnicity, income, years since initiated injecting, currently in drug dependence treatment, number of times injected in past 30 days, injected heroin in past 30 days, injected speedball in past 30 days, used noninjection cocaine in past 30 days, the most frequent injecting location is participant’s own residence, and self-reported being HIV infected