TABLE 1.

Crack cocaine use among persons who inject drugs, New York City, 1990–2011

	Crack cocaine use
	No n (%)	Yes n (%)
Time-period*
1990–1994	624 (51)	599 (49)
1995–1999	1201 (64)	688 (36)
2000–2004	1814 (71)	734 (29)
2005–2011	918 (60)	611 (40)
Gender*
Male	3848 (67)	1928 (33)
Female	707 (50)	699 (50)
Race/ethnicity*
White	1216 (63)	708 (37)
African American	763 (48)	828 (52)
Hispanic	2475 (70)	1044 (30)
HIV serostatus*
HIV−	724 (61)	464 (39)
HIV+	93 (50)	93 (50)

^*Significant difference by Chi-square test (P < 0.05).