TABLE 2.

HIV seroprevalence among NIDUs, New York City, 1995–1999 and 2005–2011

	1995–1999		2005–2011
	n	HIV+ n (%)	n	HIV+ n (%)
Total	792 (100)	64 (8)	1870 (100)	300 (16)#
Sex
Male	580 (73)	41 (7)	1447 (77)	209 (14)#
Female	212 (27)	23 (11)	423 (23)#	91 (22)*#
Race/ethnicity
White	65 (8)	1 (2)	103 (6)	6 (6)
African American	312 (39)	32 (10)	1290 (69)	226 (18)*#
Hispanic	415 (52)	31 (7)	477 (26)	68 (14)#
Age
<35	375 (47)	23 (6)	235 (13)	33 (14)#
≥35	417 (53)	41 (10)	1600 (87)	259 (16)#
Drug use past 6 months
Crack cocaine	367 (46)	42 (11)	1376 (74)	261 (19)#
Cocaine	368 (47)	30 (8)	760 (41)	91 (12)
Heroin	681 (86)	47 (7)	702 (38)	71 (10)#

^#Significant difference by Chi-square test (comparing same row across time periods).

^*Significant difference by Chi-square test (largest subgroup compared with all others within time period).