Table 2. PrEP user survey: Sourcing among those unable to obtain PrEP and sourcing, sharing, dosing, sexual health and renal function testing among current PrEP users, United Kingdom, 2019 (n =  2,275).

Characteristic		n	%
Participants who tried but were unable to obtain PrEP since January 2017 (n = 533)
Tried to source PrEP froma	From a sexual health clinic in England as part of the Impact trial	385	72.2
	Buying from the Internet	141	26.5
	Other (including from a friend, when abroad, using PEP for PrEP, from a person reselling a supply, another trial)	126	23.6
	Sexual health clinic in Scotland, Wales or Northern Ireland	22	4.1
	Buying privately from a clinic	16	3.0
	Not reported	14	2.6
Current PrEP usersb (n = 1,742)
Sourcing, sharing and dosing
Last sourced PrEP fromc	From a sexual health clinic in England as part of the Impact trial	949	54.5
	Buying from the Internet	538	30.9
	Sexual health clinic in Scotland, Wales or Northern Ireland	103	5.9
	Buying privately from a clinic	64	3.7
	Other (including from a friend, when abroad, using PEP for PrEP, from a person reselling a supply, another trial)	83	4.8
	Not reported	5	0.3
Ever shared/sold PrEP intended/bought by yourself	Yes	279	16.0
	No	1,460	83.8
	Not reported	3	0.2
How this shared/sold PrEP was originally obtaineda (n = 279)	Bought from Internet	170	60.9
	From a sexual health clinic in England as part of the Impact trial	76	27.2
	Other (incl. from a friend, when abroad, using PEP for PrEP, from a person reselling a supply, another trial)	21	7.5
	Sexual health clinic in Scotland, Wales or Northern Ireland	9	3.2
	Bought privately from a clinic	3	1.1
Dosing strategy last time used PrEP	Daily	1,303	74.8
	Other dosing regimen (including event-based, intermittently, one-off)	439	25.2
Sexual health and renal function testing
Number of HIV tests in the last 12 months	None	7	0.4
	One	107	6.2
	Two	226	13.2
	Three or more	1,375	80.1
	Not reported	27	1.5
Setting of last HIV testd (n = 1,740)	Sexual health clinic	1,523	87.5
	Other setting (including self-sampling, self-testing service and GP)	211	12.1
	Not reported	6	0.3
Number of STI tests (excluding HIV) in last 12 months	None	203	11.7
	One	168	9.6
	Two	208	11.9
	Three or more	1,153	66.2
	Not reported	10	0.6
STI diagnosis in last 12 months	Yes	882	50.6
	No	850	48.8
	Not reported	10	0.6
STI(s) diagnosed in last 12 monthsa, e (n = 882)	Gonorrhoea	575	65.2
	Chlamydia	537	60.9
	Other	239	27.1
	Not Reported	2	0.2
If ever obtained PrEP privately, had a renal function test before starting/while taking PrEP f	Yes	654	37.5
	No	660	37.9
	Not Reported	428	24.6

GP: general practitioner; NR: not reported; PEP: post-exposure prophylaxis; PrEP: pre-exposure prophylaxis; STI: sexually transmitted infection.

^a For this question, respondents could pick multiple answers.

^b Current PrEP users defined as reporting taking their first PrEP tablet in July 2019 or earlier and their last PrEP tablet in January 2019 or later.

^c Trial/programme sourcing PrEP users defined as PrEP users who last sourced their PrEP either through the Impact trial in England, another trial, or a sexual health clinic in Scotland, Wales or Northern Ireland. Privately sourcing PrEP users defined as PrEP users who last sourced PrEP either through online purchase, buying privately from a clinic, through a friend/re-seller, using PEP as PrEP or obtaining while travelling abroad.

^d This question was only asked of respondents who reported ever having an HIV test.

^e This question was only asked of respondents reporting STI diagnoses in the last 12 months.

^f This question was asked of all PrEP users, but among current PrEP users last sourcing privately (n = 638), 325 (50.9%) responded ‘Yes’ to having a renal function test, 271 (42.5%) ‘No’ and 42 (6.5%) were not reported.