| 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 |