Table 3

Univariable and multivariable regression ORs, hepatitis A IgG positivity by patient characteristics (also adjusted for clinic group)

Characteristic	Number tested	Univariable OR HAV IgG	95% CI	P value*	Multivariable OR HAV IgG	95% CI	P value
Total	2577
Age group
18–25	525	Ref		<0.001	Ref		<0.001
26–35	979	1.55	1.24 to 1.94		1.5	1.18 to 1.86
36–45	600	3.09	2.35 to 4.07		2.91	2.17 to 3.90
46 and over	473	4.09	2.98 to 5.62		3.4	2.44 to 4.75
HIV status
Negative	2228	Ref		<0.001			0.170
Positive	349	3.06	2.37 to 2.85	<0.001	1.82	1.25 to 2.64	0.170
History of STI in past year
No	1889	Ref		<0.001	Ref		<0.001
Yes	688	1.71	1.37 to 2.12	<0.001	1.58	1.25 to 2.00	<0.001
Country of birth
UK	1363	Ref		0.418	Not included
Non-UK	1123	1	0.84 to 1.21
Unknown	91	1.41	0.83 to 2.40
Region of birth
UK	1363	Ref		<0.001	Ref		<0.001
Africa	77	6.35	2.31 to 17.51		4.73	1.68 to 13.31
Americas	230	1.08	0.78 to 1.50		0.64	0.45 to 0.91
Eastern Mediterranean	71	1.71	0.91 to 3.22		1.41	0.72 to 2.73
Europe	565	0.73	0.59 to 0.90		0.56	0.44 to 0.71
South-East Asia	47	1.29	0.63 to 2.62		0.9	0.43 to 1.91
Western Pacific	132	1.65	1.04 to 2.63		1.44	0.89 to 2.35
Unknown	92	1.43	0.84 to 2.43		1.26	0.72 to 2.20

*Global p values representing the overall impact of the variable on the model.
HAV, hepatitis A virus; STI, sexually transmitted infection.