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Table 1 Demographic characteristics and sexual behaviour in two sub-samples of MSM in Germany: n (%)

From: Self-reported history of sexually transmissible infections (STIs) and STI-related utilization of the German health care system by men who have sex with men: data from a large convenience sample

  Last HIV test negative or not tested for HIV n = 3,511 HIV-positive n = 874 OR (95%-CI)/p
Recruitment and Demographics
Recruitment    <0.001 (χ2)
   Chat- and Dating Websites 3,050 (86.9) 217 (24.8)  
   'Bareback' Website 207 (5.9) 240 (27.5)  
   Medical Facilities 254 (7.2) 417 (47.7)  
Median age (range) 32 (16; 76) 40 (20; 70) >0.001 (t)
City size (population >500,000) 1,218 (34.7) 467 (53.4) 2.16 (1.86-2.51)
Education (ISCED 4 or higher) 1,836 (52.3) 414 (47.4) 0.82 (0.71-0.95)
Sexual behaviour in the previous 12 months
More than ten sexual partners 974 (27.7) 466 (53.3) 2.98 (2.56-3.64)
Sex with non-steady partners was...   
   frequently anally insertive 820 (23.4) 337 (38.6) 2.06 (1.76-2.41)
   frequently anally receptive 792 (22.6) 382 (43.7) 2.67 (2.82-3.11)
Frequent HIV risk-taking*    
   with male partners in general 222 (6.3) 233 (26.7) 5.39 (4.40-6.59)
   with anonymous partners 135 (3.8) 208 (23.8) 7.81 (6.19-9.85)
Sexual Networks: Reporting sexual partners with...
   HIV 209 (6.0) 425 (48.6) 14.96 (12.33-18.13)
   recent STIs** 178 (5.1) 192 (22.0) 5.27 (4.23-6.57)
  1. *Frequent risk-taking: Five or more episodes of unprotected anal intercourse with a non-steady sexual partner of unknown or discordant HIV serostatus in the previous twelve months; **Current sexual partners with recent STIs: diagnosed with syphilis, gonorrhoea, or Chlamydia infection in the previous twelve months.