Table 2 Summary of variables collected on electronic surveys

Age

ALL

Baseline

Soundex

ALL

Baseline

Postcode

ALL

Baseline

Country of Birth

ALL

Baseline

Length of residency in the UK

ALL

Baseline

Ethnicity

ALL

Baseline

Highest Educational Qualification

ALL

Baseline

Sexual Identity

ALL

Baseline

Timing of last HIV test

ALL

Baseline

Timing of last STI screen

ALL

Baseline

Number condomless anal intercourse partners (last 3 months)

ALL

Baseline

PrEP and PEP usage

ALL

Baseline

Confirmation of HIVST Kit receipt

BT/RT

2-weeks post kit shipment

BT

3-month post baseline

RT

3-monthly post Randomisation B entry

Confirmation of HIVST Kit usage

BT/RT

2-weeks post kit shipment

BT

3-month post baseline

RT

3-monthly post Randomisation B entry

Self-reported HIVST result

BT/RT

2-weeks post kit shipment

BT

3-month post baseline

RT

3-monthly post Randomisation B entry

Kits receipt & usage experiences

BT

3-month post baseline

RT

3-monthly post Randomisation B entry

Timing of HIV tests in last 3 months (not including HIVST)

BT/NBT

3-month post baseline

RT/NRT

3-monthly post Randomisation B entry

Self-reported HIV positive test result (from any other source)

BT/NBT

3-month post baseline

RT/NRT

3-monthly post Randomisation B entry

Timing of STI tests in last 3 months

BT/NBT

3-month post baseline

RT/NRT

3-monthly post Randomisation B entry

Number condomless anal intercourse partners (last 3 months)

BT/NBT

3-month post baseline

RT/NRT

3-monthly post Randomisation B entry

Interest in future HIVST If available

BT/NBT

3-month post baseline

Offer of another free HIVST

RT

Randomisation B Entry

RT

3-monthly post Randomisation B entry