Table 1

Characteristics and behaviours reported on self-sampling form and groupings for multivariable analysis

CharacteristicResponse optionsGrouping for initial analysisGrouping for multivariable analysis
AgeAge in years16–2516–25
26–3526–35
36–4536–45
46–5546–75
56–65
66–75
EthnicityWhite BritishWhite British/IrishWhite British/Irish
White Irish
Black AfricanBlack AfricanBlack African
Black CaribbeanBlack otherOther
Other black background
Latin AmericanOther or mixed
Other ethnic group
Other mixed background
White and Asian
White and black African
White and black Caribbean
IndianSouth Asian
Pakistani
Bangladeshi
ChineseOther Asian background
Other Asian background
Other white backgroundOther white backgroundOther white background
New partners in last 12 monthsNo new partnersNo new partnersNo new partners
Just one partnerJust one partnerJust one partner
2–5 partners2–5 partners2–5 partners
6–12 partners6–12 partners6+partners
More than 12 partnersMore than 12 partners
Unprotected sex in last 12 monthsNoNoNo new partners
Yes, with one partnerYes, with one partnerJust one partner
Yes, with 2–5 partnersYes, with 2–5 partners2–5 partners
Yes, with 6–12 partnersYes, with 6–12 partners6+ partners
Yes, with more than 12 partnersYes, with more than 12 partners
Last HIV testNever testedNever testedNever tested
Within the last yearWithin the last yearPreviously tested
Over 1 year agoOver 1 year ago
Sex under the influence of alcohol or drugsNeverNeverNever
SometimesSometimesSometimes
UsuallyUsuallyUsually
AlwaysAlwaysAlways