|Selected socio-demographic and behavioral characteristics of the study participants|
|Age, median (IQR), years (n=346)||32 (27-39)|
|Ethnicity (%) (n=346)|
|Education (%) (n=250)|
|high-school or less||52.4|
|university or more||47.6|
|Annual incomea (%) (n=251)|
|Age at first intercourse with a man, median (IQR), years (n=254)||19 (17-23)|
|N. lifetime male sex partners, median (IQR) (n=245)||50 (20-200)|
|N. male sex partners in previous 6 monthsb, median (IQR) (n=264)||5 (2-10)|
|Partnership in previous 6 monthsb (%) (n=264)|
|steady partner only||14.0|
|steady and casual partners||23.9|
|casual partners only||62.1|
|Anal sex practices in previous 6 monthsb (%) (n=227)|
|receptive and insertive||66.1|
|Condom use during receptive intercourse in previous 6 monthsb (%) (n=170)|
|more than half times||15.9|
|up to half times||2.9|
|STI historyc (%) (n=264)|
|Gonorrhea (any site)||35.2|
a Low: <12,000 €; medium: 12,000-24,000 €; high: > 24,000 €.
b During the 6 months preceding the enrollment.
c STI diagnosed more than 6 months prior to enrollment.
d Proportions of MSM with a specific STI were calculated as a percentage of the individuals with an STI history only; total sum of the percentages of patients with an STI history exceeds 100% due to patients with more than one STI.
Abbreviations: IQR, interquartile range; STI, sexually transmitted infections.
Donà et al.
Donà et al. BMC Cancer 2012 12:476 doi:10.1186/1471-2407-12-476