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Table 3 Multivariable logistic regression analysis of influence of transactional sex on HIV- and STI diagnosis, and drug use (injection drug use, benzodiazepines)

From: Links between transactional sex and HIV/STI-risk and substance use among a large sample of European men who have sex with men

Variables HIV diagnosis (ever) STI diagnosis1 Injection drug use1 Use of benzodiazepines1
OR (95% CI) aOR (95% CI) OR aOR OR aOR OR aOR
Transactional sex
 Neither frequent buying nor selling sex Ref   Ref   Ref   Ref  
 Frequent buying sex 1.50 (1.37–1.64) 0.85 (0.77–0.93) 1.20 (1.07–1.34) 0.87 (0.78–0.97) 1.40 (1.19–1.65) 1.20 (1.01–1.42) 1.50 (1.38–1.66) 1.37 (1.26–1.50)
 Frequent selling sex 2.33 (2.04–2.66) 1.60 (1.39–1.85) 3.86 (3.41–4.35) 1.75 (1.54–2.00) 6.40 (5.51–7.42) 3.17 (2.70–3.73) 2.47 (2.19–2.78) 2.13 (1.88–2.41)
Age: < 25 Ref   Ref   Ref   Ref  
 25–39 5.34 (4.90–5.83) 4.83 (4.42–5.29) 1.68 (1.59–1.78) 1.31 (1.23–1.39) 1.26 (1.12–1-40) 1.00 (0.91–1.08) 1.27 (1.22–1.32) 1.17 (1.12–1.23)
 40 + 11.27 (10.27–12.20) 9.46 (8.65–10.35) 1.47 (1.38–1.56) 1.06 (0.99–1.13) 1.12 (1.05–1.20) 0.83 (0.76–0.92) 1.32 (1.26–1.39) 1.17 (1.11–1.23)
Number of sex partners1: 1 Ref   Ref   Ref   Ref  
 2–10 sex partners 1.30 (1.23–1.37) 1.20 (1.13–1.27) 2.40 (2.23–2.58) 2.06 (1.91–2.22) 0.34 (0.31–0.37) 1.55 (1.40–1.72) 1.07 (1.03–1.11) 1.06 (1.02–1.11)
 11–50 sex partners 2.89 (2.73–3.04) 2.39 (2.25–2.53) 6.35 (5.91–6.83) 5.32 (4.93–5.73) 0.53 (0.49–0.57) 2.95 (2.65–3.28) 1.33 (1.27–1.40) 1.26 (1.20–1.33)
 50 + partners 7.51 (7.01–8.05) 5.76 (5.39–6.21) 14.86 (13.64–16.19) 11.94 (10.90–13.07) 2.37 (2.14–2.63) 6.10 (5.34–6.97) 1.85 (1.72–2.00) 1.63 (1.51–1.77)
Education: High Ref   Ref   Ref   Ref  
 Mid 0.98 (0.94–1.02) 1.28 (1.23–1.33) 0.83 (1.78–0.90) 0.98 (0.94–1.02) 1.12 (1.05–1.20) 1.22 (1.14–1.31) 0.83 (0.80–0.86) 0.88 (0.84–0.91)
 Low 1.34 (1.26–1.42) 1.58 (1.48–1.69) 0.82 (0.79–0.86) 1.10 (0.93–1.09) 1.26 (1.13–1.40) 1.37 (1.22–1.54) 1.04 (0.98–1.10) 1.08 (1.01–1.14)
  1. Legend: 1 = In the past 12 months. For explanation of education, see Table 1. STI diagnoses include syphilis, gonorrhea, Chlamydia. Injection drug use includes any use of heroin or crack cocaine or injection of any recreational drugs other than steroids