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Table 1 Comparison of OCS participants’ characteristics between the participating and non-participating sites in the representativeness study

From: Representativeness of an HIV cohort of the sites from which it is recruiting: results from the Ontario HIV Treatment Network (OHTN) cohort study

  All sites 4 sites in representativeness study Other sites  
Characteristics   (n=3106) (n=1861) (n=1245) p value
Age   46 (40–52) 46 (40–52) 46 (40–52) 0.77
Male   2628 (85%) 1632 (88%) 996 (80%) <.0001
Risk factor      
  MSM 2133 (71%) 1429 (77%) 704 (60%) <.0001
  IDU 364 (12%) 180 (10%) 184 (16%) <.0001
  heterosexual 629 (21%) 325 (18%) 304 (26%) <.0001
  Blood product/MTCT 197 (6%) 102 (5%) 95 (8%) 0.009
Race      0.02
  Caucasian 2170 (72%) 1329 (72%) 841 (72%)  
  Black/African 418 (14%) 259 (14%) 159 (14%)  
  Aboriginal 161 (5%) 83 (4%) 78 (7%)  
  Other 264 (9%) 176 (10%) 88 (8%)  
Born in Canada   2090 (69%) 1264 (69%) 826 (70%) 0.35
Years since HIV+ test   11 (6–17) 12 (5–18) 11 (6–17) 0.41
Cigarette history      0.006
  Never 1017 (35%) 623 (35%) 394 (35%)  
  Former 736 (25%) 479 (27%) 257 (23%)  
  Current 1161 (40%) 671 (38%) 490 (43%)  
Alcohol use   1102 (38%) 718 (40%) 384 (34%) 0.0003
Substance use   614 (21%) 414 (23%) 200 (18%) 0.0002
Education      <.0001
  High school or lower 929 (32%) 504 (28%) 425 (37%)  
  Some/completed college 890 (30%) 545 (31%) 345 (30%)  
  Some/completed university 1102 (38%) 732 (41%) 370 (32%)  
Employed   1401 (48%) 920 (52%) 481 (42%) <.0001
Household income      <.0001
  < 30 K 1062 (40%) 566 (35%) 496 (47%)  
  30-60 K 612 (23%) 378 (24%) 234 (22%)  
  60-80 K 298 (11%) 189 (12%) 109 (10%)  
  > 80 K 693 (26%) 470 (29%) 223 (21%)  
General health      <.01
  Good 2353 (81%) 1466 (82%) 887 (78%)  
  Fair 464 (16%) 248 (14%) 216 (19%)  
  Poor 103 (4%) 65 (4%) 38 (3%)  
On cART   2497 (80%) 1487 (80%) 1010 (81%) 0.40
CD4 count (cells/mm3)   471 (330–650) 480 (340–650) 460 (310–649) 0.02
VL < 50 copies/mL   2254 (73%) 1379 (74%) 875 (70%) 0.02
  1. OCS Ontario HIV Treatment Network Cohort Study, MSM men who have sex with men, IDU injection drug use, MTCT mother to child transmission, cART combination antiretroviral therapy, VL viral load.
  2. Numbers are reported as median (interquartile range) or frequency (percentage).