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Table 1 Risk factors related to early syphilis, overall and by HIV serostatus. Barcelona 2015

From: Early syphilis: risk factors and clinical manifestations focusing on HIV-positive patients

   HIV negative
N = 167%
95%CI
HIV positive
N = 95%
95%CI
ALL
N = 266a
%
p Value aOR
(95% CI)
Sexual practices and condomless anal sex (CAS) CAS 104 75 183 0.002  
65.5 84.3 72.5
(57.4, 72.7) (75.0, 91.1)  
Receptive anal sex 107 77 185 0.011  
67.3 82.8 72.3
(59.4, 74.5) (73.5, 89.8)  
Receptive CAS 40 46 88 0.005  
39.6 62.2 49.7
(30.0, 49.8) (50.1, 73.2)  
Number of casual partners 10 10 10 0.041  
[4-5] [5.75–32.8] [4-20]
Number of casual partners with anal sex 5 6.5 6 0.039  
[2-12] [4–21.5] [2-15]
Number of casual partners with CAS 1 3 1 0.001  
[0–2.25] [1-7] [0-4]
Sexual risk behaviors Serosorting 4 28 32 < 0.001 20.4
3 43.1 16 [7.99–60.96]
(0.8, 7.6) (30.8, 55.9)  
Seroposition 10 15 25 0.004  
8.4 25.4 13.8
(4.1, 14.9) (14.9, 38.4)  
Contact through App 99 65 166 0.164  
61 70.7 64.3
(53.1, 68.6) (60.2, 79.7)  
Contact through internet 55 34 89 0.729  
34 37 34.5
(26.7, 41.8) (27.1, 47.6)  
Club sex 27 27 54 0.027  
16.7 29.3 20.9
(11.2, 23.3) (20.3, 39.7)  
Sauna 33 17 50 0.841  
20.4 18.5 19.5
(14.4, 27.4) (11.1, 27.9)  
Fisting 28 21 50 0.232  
18.1 25.6 20.7
(12.3, 25.0) (16.6, 36.4)  
Sex in group 66 59 125 < 0.001  
41.8 69.4 50.6
(34.0, 49.8) (58.4, 78.9)  
Toys 53 39 93 0.06  
33.3 46.4 37.7
(26.0, 41.2) (35.4, 57.6)  
Drugs for sex 78 66 145 < 0.001  
46.7 71 54.7
(38.9, 54.5) (60.6, 79.9)  
 Cocaine 21 27 49 0.096  
26.4 41.5 34
(17.5, 38.1) (29.4, 54.4)  
 Mephedrone 4 12 16 0.024  
5 18.5 11
(1.4, 12.6) (9.9, 30.0)  
 GHB 22 35 58 0.003  
28.2 53.8 40.3
(18.6, 39.5) (41.0, 66.3)  
 Sildenafil 20 29 49 0.028  
25.6 44.6 34
(16.4, 36.8) (32.2, 57.4)  
 Crystal methamphetamine 9 19 28 0.015  
11.5 29.2 19.5
(5.4, 20.7) (18.6, 41.8)  
Poly drug use 27 34 61 0.05  
16 37 22.6
(10.9, 22.6) (23.2, 46.2)  
Chemsex 26 40 67 0.001  
15.5 42 25
(10.4, 21.9) (32.0, 52.6)
  1. +in italics: median with interquartile range in brackets
  2. afour cases with HIV unknown serostatus