Table 3 Independent risk factors for STI-acquisition regarding risk groups, bivariable and multivariable logistic regression (n = 2145)
| Â | Bivariable analysis | Multivariable analysis* | ||||
|---|---|---|---|---|---|---|
OR | 95%-CI | p | OR | 95%-CI | p | |
Risk group (ref. HIV−/PrEP-) | ||||||
 HIV+ | 1.33 | 1.08–1.64 | 0.01 | 1.7 | 1.34–2.16 | 0.00 |
 HIV−/PrEP+ | 2.03 | 1.51–2.70 | 0.00 | 1.98 | 1.46–2.66 | 0.00 |
Demographics | ||||||
 Age groups (ref. 40–49 yrs) | ||||||
  18–24 yrs | 0.82 | 0.51–1.31 | 0.40 | 1.08 | 0.64–1.79 | 0.78 |
  25–29 yrs | 1.46 | 1.08–1.96 | 0.01 | 1.48 | 1.08–2.04 | 0.02 |
  30–39 yrs | 1.26 | 1.00–1.59 | 0.05 | 1.16 | 0.90–1.48 | 0.24 |
  50–59 yrs | 0.69 | 0.51–0.91 | 0.01 | 0.67 | 0.50–0.91 | 0.01 |
   > 59 yrs | 0.45 | 0.25–0.81 | 0.01 | 0.5 | 0.28–0.91 | 0.02 |
 City of testing (ref. Cologne) | ||||||
  Aachen | 0.48 | 0.36–0.91 | 0.02 | 0.68 | 0.42–1.09 | 0.11 |
  Berlin | 1.2 | 0.88–1.63 | 0.26 | 1.22 | 0.87–1.70 | 0.24 |
  Bochum | 0.58 | 0.39–0.85 | 0 | 0.66 | 0.44–1.0 | 0.05 |
  Dortmund | 0.77 | 0.46–1.28 | 0.31 | 0.91 | 0.54–1.54 | 0.74 |
  Dresden | 1.00 | 0.61–1.62 | 0.99 | 1.07 | 0.65–1.77 | 0.79 |
  Munich | 1.19 | 0.82–1.73 | 0.94 | 1.15 | 0.78–1.71 | 0.48 |
  Nurnberg | 1.56 | 0.73–3.32 | 0.25 | 1.53 | 0.69–3.40 | 0.29 |
  Stuttgart | 0.99 | 0.66–1.49 | 0.96 | 1.03 | 0.67–1.59 | 0.88 |
 Country of birth (ref. Germany) | ||||||
  Other country | 1.24 | 1.01–1.51 | 0.04 | 1.06 | 0.85–1.32 | 0.60 |