Abstract P185 – Table 1. Main characteristics of people living with HIV with and without a new diagnosis of syphilis and the rate of syphilis in selected populations. Values are frequencies with percentages and median with first and third quartile. Rates are presented per 100 person‐years (PY) with 95% confidence intervals (95% CI).
	Syphilis No (N = 1104)	Yes (N = 211)	Total (N = 1315)	p‐value	Syphilis rate per 100 PY and 95% CI
Sex at birth				<0.001
Female	128 (11.6)	0 (0)	128 (9.8)
Male	973 (88.4)	211 (100.0)	1184 (90.2)		6.4 (5.6 to 7.2)
Age, years				<0.001
<35	261 (23.6)	73 (34.6)	334 (25.4)		8.5 (6.7 to 10.6)
35 to 50	520 (47.1 )	103 (48.8 )	623 (47.4)		5.7 (4.7 to 6.9)
>50	323 (29.3 )	35 (16.6)	358 (27.2)		3.5 (2.4 to 5.0)
Mode of transmission				<0.001
MSM	775 (70.2)	201 (95.3)	976 (74.2)		7.4 (6.5 to 8.5)
Heterosexual	254 (23.0)	5 (2.4)	259 (19.7)		0.6 (0.3 to 1.6)
Other/unknown	75 (6.8)	5 (2.4)	80 (6.1)		1.8 (0.8 to 4.1)
Living in Zagreb				<0.001
No	633 (57.3)	81 (38.4)	714 (54.3)		4.2 (3.3 to 5.3)
Yes	471 (42.7)	130 (61.6)	601 (45.7)		7.5 (6.4 to 8.9)
Had clinical AIDS				<0.001
No	816 (73.9)	184 (87.2)	1000 (76.0)
Yes	288 (26.1)	27 (12.8)	315 (24.0)
Antiretroviral therapy				0.39
After baseline	77 (7.0)	20 (9.5)	97 (7.4)
Before baseline	1018 (92.2)	190 (90.0)	1208 (91.9)
No ART	9 (0.8)	1 (0.5)	10 (0.8)
Baseline HIV‐1 RNA				0.005
≥50 copies/mL	251 (23.1)	68 (32.2)	319 (24.6)
<50 copies/mL	835 (76.9)	143 (67.8)	978 (75.4)
Baseline CD4 cell count per mm3				0.28
>500	628 (60.3)	135 (64.3)	763 (60.9)
≤500	414 (39.7)	75 (35.7)	489 (39.1)
Duration of HIV infection, years	5.5 (1.4 to 12.0)	2.8 (0.3 to 6.5)	5.0 (1.2 to 11.3)	<0.001
Antibody to hepatitis C				0.3
Negative	1037 (93.9)	202 (95.7)	1239 (94.2)
Positive	67 (6.1)	9 (4.3)	76 (5.8)
Hepatitis B surface antigen				0.67
Negative	1049 (95.0)	199 (94.3)	1248 (94.9)
Positive	55 (5.0)	12 (5.7)	67 (5.1)