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Table 4 Independent risk factors for STI-acquisition regarding sexual behaviour, bivariable and multivariable logistic regression (n = 1864)

From: STI in times of PrEP: high prevalence of chlamydia, gonorrhea, and mycoplasma at different anatomic sites in men who have sex with men in Germany

  Bivariable analysis Multivariable analysis*
OR 95%-CI p OR 95%-CI p
Demographics
 Age in groups (ref. 40–49 yrs)
  18–24 yrs 0.82 0.51–1.31 0.40 1.10 0.64–1.85 0.33
  25–29 yrs 1.46 1.08–1.96 0.01 1.45 1.02–2.07 0.04
  30–39 yrs 1.26 1.00–1.59 0.05 1.28 0.97–1.67 0.08
  50–59 yrs 0.69 0.51–0.91 0.01 0.72 0.51–1.01 0.06
   > 59 yrs 0.45 0.25–0.81 0.01 0.60 0.30–1.17 0.13
 City of testing (ref. Cologne)
  Aachen 0.77 0.36–0.91 0.02 0.89 0.53–1.50 0.66
  Berlin 1.20 0.88–1.63 0.26 1.10 0.76–1.60 0.60
  Bochum 0.58 0.39–0.85 0 0.72 0.45–1.13 0.16
  Dortmund 0.77 0.46–1.28 0.31 1.50 0.82–2.74 0.19
  Dresden 1 0.61–1.62 0.99 1.84 1.03–3.29 0.04
  Munich 1.19 0.82–1.73 0.94 1.37 0.89–2.11 0.15
  Nurnberg 1.56 0.73–3.32 0.25 1.71 0.68–4.30 0.25
  Stuttgart 0.99 0.66–1.49 0.96 1.24 0.77–1.98 0.38
Sexual behaviour during the last 6 months
 Number of male sex partners (ref. 0–5)
   > 5 2.12 1.74–2.58 0.00 1.56 1.25–1.96 0.00
 Sex without condom (ref. no)
  yes 2.70 2.13–3.42 0.00 2.09 1.58–2.76 0.00
 Use of party drugs (ref. no)
  yes 2.68 2.02–3.57 0.00 1.62 1.30–2.01 0.00
  1. * p < 0.01 for overall multivariable logistic regression model