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Table 1 Characteristics of 4,232 HIV-positive participants in the OHTN Cohort Study, 2000-2009

From: Patterns of syphilis testing in a large cohort of HIV patients in Ontario, Canada, 2000–2009

  n %
Female 608 14.4%
HIV exposure category   
  MSM 2647 62.5%
  MSM-IDU 207 4.9%
  IDU 319 7.5%
  Endemic 330 7.8%
  Heterosexual 447 10.6%
  Other risk 146 3.4%
  Unknown risk 136 3.2%
Region of Ontario   
  Toronto 2680 63.3%
  Ottawa 508 12.0%
  Other 1044 24.7%
Ethnicity   
  White 2854 67.4%
  Black/African 409 9.7%
  Multiple 318 7.5%
  Aboriginal 247 5.8%
  Other 235 5.6%
  Unknown 169 4.0%
Any HIV antiretroviral medication during follow-up 3739 88.3%
Mean age at baseline* (SD) 43.5 (9.6)
Median year of HIV diagnosis (IQR) 1995 (1990–2001)
Median # months of prospective follow-up (IQR) 22 (13–89)
Mean CD4 cell count/mm3 at baseline* (SD) 455 (266)
Median log10 viral load at baseline* (IQR) 1.4 (1.4-3.7)
  1. MSM, men who have sex with men. IDU, injection drug user. SD, standard deviation. IQR, interquartile range.
  2. * Baseline = later of January 1, 2000 or enrolment date.