Table 3

 Factor associated with being HIV positive at baseline (univariate analysis)

Prevalence of HIV (%)p Value
IDU, injecting drug use; UPAI, unprotected anal intercourse.
*Test for trend.
Year group of recruitment
    1994 to 199622/156 (14.1)0.04
    1997 to 199914/223 (6.3)
    2000 to 200323/257 (8.9)
Country of birth
    UK22/212 (10.4)0.508
    other37/423 (8.7)
Age
    15–19 years1/60 (1.7)0.001*
    20–24 years18/267 (6.7)
    25–29 years26/212 (12.3)
    ⩾30 years14/97 (14.4)
Sexual orientation
    Homosexual53/477 (11.1)0.001
    Bisexual4/121 (3.3)0.006
    Heterosexual1/32 (3.1)0.167
History of IDU
    Yes16/60 (26.7)<0.001
    No41/570 (7.2)
Time in sex work
    <6 months17/316 (5.4)0.001*
    7–12 months9/100 (9.0)
    13–24 months13/109 (11.9)
    >2 years15/95 (15.8)
UPAI with casual partner
    Yes12/58 (20.7)0.005
    No31/393 (7.9)
UPAI with client
    Yes3/18 (16.7)0.25
    No48/586 (8.2)