Table 1

Demographics of study population

CharacteristicControls* (n=136)Cases* (n=74)p Value
*Column percentages.
†Data for one patient unavailable.
Cases: men who have ever had sex with men.
Controls: men who have never had sex with other men.
Age group (years)
    16–20 8 (6%) 4 (5%)
    21–25 29 (21%)17 (23%)
    26–30 34 (25%)19 (26%)
    31–35 26 (19%)12 (16%)
    Over 35 39 (29%)22 (30%) 0.99
History of travel outside UK, W Europe, N America, Australia
    No 74 (56%)47 (64%)
    Yes 59 (44%)27 (36%) 0.2
Born in the UK
    No 20 (15%) 8 (11%)
    Yes116 (85%)66 (89%) 0.3
z namest="c1" nameend="c4">Raised in the UK
    No 24 (18%) 8 (11%)
    Yes112 (82%)66 (89%) 0.13
Ever injected drugs
    No135 (99%)73 (99%)
    Yes 1 (0.7%) 1 (1%) 0.6
Ethnicity†
    Black African 3 (2%) 2 (3%)
    Black Caribbean 36 (26%) 1 (1%)
    Black other 3 (2%) 0
    Indian 6 (4%) 3 (4%)
    White 82 (60%)64 (88%)
    Other 6 (4%) 3 (4%)<0.001