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. Author manuscript; available in PMC: 2012 Jan 1.
Published in final edited form as: Addict Behav. 2010 Sep 26;36(1-2):61–67. doi: 10.1016/j.addbeh.2010.08.022

Table 1.

Demographic and Injection Drug Use Characteristics of HIV-infected and HIV-uninfected Study Participants (N = 1,052)

Characteristic HIV-Infected
N = 312
HIV-Uninfected
N = 740
P
Age, years 0.191
  20-29 1 (0.3) 20 (2.7)
  30-39 43 (13.8) 82 (11.1)
  40-49 137 (43.9) 304 (41.1)
  50-59 125 (40.1) 280 (37.8)
  ≥ 60 6 (1.9) 54 (7.3)
  Median age 49 49
Sex 0.078
  Male 191 (61.2) 495 (66.9)
  Female 121 (38.8) 245 (33.1)
Race 0.013
  Black 291 (94.2) 644 (88.5)
  White 13 (4.2) 69 (9.5)
  Other 5 (1.6) 15 (2.1)
Annual income 0.318
  Less than $5,000 233 (74.7) 539 (72.8)
  $5,000 – $9,999 52 (16.7) 119 (16.1)
  $10,000 or more 17 (5.5) 63 (8.5)
Active injection drug use
 By frequency 0.003
  None 201 (64.4) 432 (58.4)
  Less than daily 76 (24.4) 160 (21.6)
  Daily or greater 35 (11.2) 148 (20.0)
 By type 0.004
  Heroin alone 14 (4.5) 84 (11.4)
  Cocaine alone 10 (3.2) 17 (2.3)
  Heroin and cocaine 63 (20.2) 155 (20.9)
  Other 24 (7.7) 52 (7.0)
Age first injected drugs, years
  Median (IQR) 20 (17-24) 21(17-26) 0.026

Abbreviations: HIV human immunodeficiency virus, IQR interquartile range

Entries in table are number of participants (%), unless otherwise indicated.