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Table 1 Characteristics of HIV+ patients regularly followed at the Southern Alberta Clinic between 1/1/2006 and 12/31/2016 comparing patients who were negative for syphilis (Syphilis Neg) to patients who ever tested positive for syphilis (Syphilis Pos)

From: Increasing incidence of syphilis among patients engaged in HIV care in Alberta, Canada: a retrospective clinic-based cohort study

  Total Syphilis Neg Syphilis Pos P-value
N (%) 2448 2254 (92.1) 194 (7.9)  
Age at HIV Diagnosis (years)
Mean (range) 35 (1–79) 35 (1–79) 35 (16–69) 0.893
< 30 888 (36.2) 813 (36.1) 75 (38.7) 0.801
30–39 868 (35.5) 802 (35.6) 66 (34.0)  
40–49 475 (19.4) 438 (19.4) 37 (19.1)  
≥ 50 217 (8.9) 201 (8.9) 16 (8.3)  
Gender
Male 1858 (75.9) 1675 (74.3) 183 (94.3) <.001
Female 583 (23.8) 572 (25.4) 11 (5.6)  
Transgendered 7 (0.3) 7 (0.3) 0 (0.0)  
Self-reported Ethnicitya
Caucasian 1399 (57.1) 1259 (56.0) 140 (72.2) <.001
Indigenous 222 (9.1) 216 (9.6) 6 (3.1)  
ACB 560 (22.9) 536 (23.8) 24 (12.4)  
Other 267 (10.9) 243 (10.8) 24 (12.4)  
Most Likely HIV Exposure Categoryb
MSM 1060 (43.3) 915 (40.6) 145 (74.4) <.001
HET 526 (21.5) 512 (22.7) 14 (7.2)  
PWID 761 (31.1) 731 (32.4) 30 (15.6)  
Other 101 (4.1) 96 (4.3) 5 (2.6)  
Co-factorsc
History of Smoking 1252 (51.1) 1142 (50.7) 110 (56.7) 0.124
History of Alcohol Abuse 460 (18.8) 404 (17.9) 56 (28.9) <.001
History of Recreational
Drug Use 794 (32.4) 707 (31.4) 87 (44.8) <.001
History of Unstable
Housing 516/2109 483/1932 33/177 0.073
(24.5) (25.0) (18.6)  
History of Intimate
Partner Violence 655 (26.7) 614 (27.2) 41 (21.1) 0.079
  1. aNative Canadian includes Aboriginal, Metis and Inuit; ACB includes African, Caribbean, Black; Other includes IndoAsian, Hispanic, East Asian, and other
  2. bMSM = self-reported men who have sex with men identification; HET = self-reported heterosexual identification; PWID = self-reported intravenous drug use identification; Other HIV Risk factor behavior includes: blood transfusions, hemophiliac, neonatal, postnatal infection, unknown or not reported
  3. cHistory of Cigarette Smoking-Current or Past; History of Alcohol Abuse- > 14 drinks/week or binge drinking; History of Recreational Drug Use –Current or Past; History of Unstable Housing-homelessness, shelters, supporatative housing; History of Intimate Partner Violence-Current or Past