Table 1

City profiles and individual-level multivariable logistic regression

	Respondents	Recruitment1 PlanetRomeo.	Age2		Diagnosed HIV3	More than10 sexual partners4	Screening5	Inaccessibility of STI services6		Blood test7		Genital test 8		Inspection 9		Anal swab 10
City	N	%	% <25	% 40+	%	%	%	%	AOR	%	AOR	%	AOR	%	AOR	%	AOR
Amsterdam	957	59.6	5.2	50.3	23.4	42.9	48.0	11.3	1.72	95.8	***1.22	88.0	*1.01	57.8	°1.11	72.4	°1.12
Athens	1406	80.9	20.3	19.6	11.6	31.7	26.1	44.4	6.55	94.1	0.41	31.4	0.11	15.1	0.12	11.5	0.06
Barcelona	1946	63.3	18.5	22.2	12.7	42.7	36.1	19.9	2.20	93.0	0.65	36.8	0.18	12.2	0.14	12.5	0.09
Belgrade	442	91.0	30.3	9.7	4.1	18.7	26.0	35.7	3.71	94.6	0.43	26.8	0.11	8.0	0.06	3.6	0.02
Berlin	5920	81.9	16.4	33.9	16.5	35.7	31.1	24.9	2.98	92.2	0.51	49.3	0.22	19.5	0.18	24.6	0.16
Birmingham	338	7.1	18.3	34.0	12.2	30.4	39.9	7.4	*0.65	85.5	***0.77	97.7	*0.92	36.6	0.47	56.5	0.66
Brussels	1192	64.2	14.2	31.5	8.7	39.7	36.0	53.2	12.16	96.1	0.71	42.4	0.23	7.3	0.08	5.8	0.05
Bucharest	629	66.0	32.6	10.3	3.5	28.0	31.5	52.5	8.50	89.8	0.60	45.5	0.22	6.4	0.06	6.4	0.04
Budapest	1158	70.0	26.1	10.9	4.3	23.0	26.3	49.6	6.83	95.6	0.46	36.7	0.14	19.7	0.17	12.9	0.09
Cologne/Bonn	2168	84.3	16.9	30.7	15.3	33.8	31.5	24.5	2.94	92.6	0.49	48.0	0.20	15.0	0.13	14.6	0.08
Copenhagen	696	22.3	15.8	30.9	13.7	36.4	31.3	3.5	0.31	94.9	0.69	65.0	0.44	32.7	0.41	40.2	0.35
Dublin	882	19.5	22.3	18.0	7.2	29.2	37.1	23.9	2.67	95.6	***0.84	91.0	0.75	70.7	°1.07	69.2	0.76
Hamburg	2143	83.9	16.7	33.7	11.5	29.9	27.3	25.2	2.70	90.2	0.42	43.9	0.18	20.0	0.17	15.7	0.10
Helsinki	657	40.3	16.1	29.7	5.8	22.0	20.8	15.7	1.46	94.0	0.40	91.0	0.37	47.0	0.38	49.3	0.31
Istanbul	991	75.8	35.0	9.5	1.4	36.0	8.9	65.8	10.60	91.6	0.15	42.2	0.09	18.1	0.06	8.4	0.02
Kiev	514	13.2	26.3	7.6	7.6	18.1	22.7	40.6	5.62	87.3	0.47	55.5	0.31	13.6	0.13	15.5	0.08
Lisbon	1537	12.4	20.8	24.9	10.0	25.1	23.4	47.2	6.93	91.9	0.41	67.1	0.26	11.1	0.08	11.1	0.05
Ljubljana	298	50.7	24.5	13.1	4.4	15.6	21.3	32.2	3.15	90.3	0.43	40.3	0.18	25.8	0.23	32.3	0.18
London	4816	25.4	11.6	33.3	15.4	40.6	43.6	8.4	1.00	93.5	^R 1.00	93.3	^R 1.00	57.8	^R 1.00	71.5	^R 1.00
Lyon	436	60.8	26.4	21.1	7.1	38.9	34.6	23.4	2.48	93.8	0.65	24.8	0.13	8.3	0.09	4.1	0.03
Madrid	2630	40.8	20.8	19.5	10.1	37.1	31.5	22.6	2.46	95.7	0.69	42.4	0.25	12.5	0.14	14.9	0.11
Manchester	586	11.6	20.5	29.0	15.2	35.3	41.1	6.6	*0.70	89.5	°0.89	94.9	*0.97	51.1	°0.83	65.8	°0.86
Milan	1657	78.8	18.6	23.4	10.4	41.8	33.6	32.9	4.14	96.7	0.56	32.3	0.13	11.7	0.11	11.3	0.07
Moscow	1609	15.2	19.8	11.8	9.7	26.7	36.3	39.2	6.84	91.3	°0.92	68.4	0.57	21.0	0.25	18.4	0.13
Munich	2144	86.8	14.6	32.5	11.3	31.8	26.7	27.9	3.18	90.3	0.40	42.5	0.17	15.1	0.12	16.6	0.09
Oslo	763	13.0	20.6	28.6	5.2	23.5	36.5	14.5	1.59	90.0	**0.85	88.2	***0.80	44.6	0.71	61.3	0.76
Paris	3412	55.7	15.7	30.3	13.6	46.6	40.6	23.0	2.93	94.6	0.73	33.8	0.18	9.2	0.11	7.7	0.06
Porto	562	8.5	33.8	17.1	7.9	20.5	23.0	47.8	6.37	90.0	0.39	56.7	0.21	10.0	0.09	6.7	0.04
Prague	864	24.9	27.2	12.5	5.0	22.5	21.8	47.1	5.85	93.8	0.40	59.7	0.24	18.8	0.16	16.5	0.10
Riga	418	19.9	25.8	15.6	3.4	18.1	24.9	54.0	9.35	90.6	0.49	65.6	0.29	17.7	0.14	16.7	0.08
Rome	1578	76.3	20.2	27.4	8.5	34.0	24.0	42.2	5.73	91.5	0.37	43.5	0.14	13.5	0.10	17.1	0.08
Sofia	483	33.3	30.2	7.9	1.9	25.8	24.0	49.5	7.62	85.0	0.43	37.4	0.18	9.3	0.08	11.2	0.05
St Petersburg	667	11.2	25.2	10.0	5.6	23.7	32.0	40.7	6.59	90.0	0.71	76.6	0.56	32.8	0.38	26.9	0.18
Stockholm	1160	18.4	12.7	37.2	7.7	26.9	37.5	15.7	1.82	90.7	0.79	94.9	***0.84	61.9	°0.94	68.2	0.83
Tallinn	312	34.0	26.3	16.3	1.9	17.9	20.1	41.0	4.79	91.5	0.42	50.8	0.24	18.6	0.12	20.3	0.10
Turin	539	76.1	19.7	23.4	6.1	35.5	27.5	30.5	3.21	95.1	0.53	64.3	0.32	37.1	0.41	46.2	0.37
Valencia	422	43.6	24.6	23.2	7.9	29.7	26.3	33.0	3.77	92.4	0.48	32.4	0.13	8.6	0.09	4.8	0.03
Vienna	1671	74.7	23.3	25.0	8.2	31.1	28.3	22.3	2.16	88.8	0.46	56.2	0.26	21.8	0.20	25.7	0.17
Warsaw	818	70.2	23.5	9.2	7.4	24.5	22.4	44.5	5.85	90.4	0.36	38.8	0.13	11.2	0.10	6.2	0.03
Zurich	1009	88.3	10.1	38.9	15.0	39.4	33.0	36.1	5.76	92.7	0.54	47.3	0.24	17.6	0.17	15.3	0.09
Sum/Median	52430	53.2	20.6	23.3	8.1	30.2	29.7	32.6	3.46	92.1	0.50	48.7	0.23	17.9	0.14	16.1	0.09
Control variables for multivariable logistic regression analyses	Age					<25			1.24		0.80		0.84		***0.89		°0.94
						25–39			^R 1.00		^R 1.00		^R 1.00		^R 1.00		^R 1.00
						40 +			0.77		0.75		0.79		0.74		0.65
	HIV diagnosis					Yes			0.36		5.19		3.60		2.76		3.70
	Number of sexual partners in the last 12 months					None			n.a.		^R 1.00		^R 1.00		^R 1.00		^R 1.00
						1			n.a.		1.29		1.28		1.37		1.29
						2–5			n.a.		1.86		1.87		1.90		1.81
						6–10			n.a.		2.58		2.45		2.55		2.60
						> 10			n.a.		3.97		3.60		3.78		3.94
	Recency of last STI test					Last 12 months			^R 1.00		n.a.		n.a.		n.a.		n.a.
						Longer ago			1.80		n.a.		n.a.		n.a.		n.a.
						Never tested			3.82		n.a.		n.a.		n.a.		n.a.
	Recruitment					PlanetRomeo			**0.99		0.99		0.99		*0.99		*1.00
Explanation of variance						NAGELKERKE's R²			0.242		0.183		0.206		0.211		0.286

(1) Per cent recruited through individual message on PlanetRomeo; (2) Per cent under 25 years of age, Per cent aged 40 years or more; (3) Per cent with diagnosed HIV; (4) Per cent with more than 10 sex partners in the last 12 months; (5) Per cent tested in the absence of symptoms for STIs other than HIV in the last 12 months; (6) Per cent who did not know whether STI testing is for free or affordable where they live. Among those screened for STIs in the last 12 months, (7) Per cent having provided blood, (8) Per cent having provided urine sample or had something inserted into their penis, (9) Per cent having had their penis and anus inspected, (10) Per cent having had something inserted into their anus (anal swab). AOR, Adjusted OR for (7–10) the effect size is combined for being screened for STIs and having undergone the respective diagnostic procedure; Statistical significance: AOR was significantly different from 1 (^R=Reference) with p≤0.001 unless marked otherwise: *p>0.5; °p>0.1; ** p>0.05; *** p>0.01.
STI, sexually transmitted infection; n.a., not applied.