Table 3.

Logistic regression model of main effects between variables of interest and measles, mumps, rubella and VZV IgG seronegativity/equivocal

	Measles IgG negative*		Mumps IgG negative*		Rubella IgG negative*		VZV IgG negative*
	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P
Country of birth: Germany	**		1·439 (1·111–1·863)	0·006	1·409 (1·003–1·980)	0·048	**
Duration of HIV infection (years)	**		1·013 (1·005–1·022)	0·002	**		1·022 (1·001–1·044)	0·040
HIV acquisition: MSM	**		1·320 (1·044–1·669)	0·020	**		**
CDC stage (ref. stage C)
A	0·853 (0·510–1·426)	0·543	0·738 (0·537–1·015)	0·062	**		**
B	0·289 (0·096–0·872)	0·028	1·138 (0·757–1·711)	0·533	**		**
CD4 nadir (cells/μl) (ref. ⩾500)
<200	**		**		2·036 (0·979–4·235)	0·057	**
<350	**		**		1·799 (0·868–3·728)	0·114	**
<500	**		**		1·573 (0·716–3·456)	0·260	**
CD4 baseline (cells/μl) (ref. ⩾500)
<200	1·796 (0·900–3·586)	0·097	1·218 (0·743–2·023)	0·446	1·768 (0·952–3·284)	0·071	**
<350	1·673 (0·988–2·832)	0·055	1·007 (0·716–1·417)	0·967	1·236 (0·778–1·965)	0·370	**
<500	1·104 (0·693–1·760)	0·676	0·716 (0·533–0·961)	0·026	0·940 (0·623–1·418)	0·767	**
HIV RNA (copies/ml) ⩽40	**		0·806 (0·604–1·076)	0·233	0·828 (0·540–1·271)	0·388	1·022 (1·001–1·044)	0·045
On ART	**		**		1·308 (0·681–2·512)	0·420	**
Age (years)	0·909 (0·892–0·927)	0·000	0·961 (0·950–0·972)	0·000	0·976 (0·962–0·990)	0·001	0·942 (0·913–0·968)	0·000
Male sex	1·134 (0·850–2·030)	0·219	**		**		0·637 (0·358–1·133)	0·125

OR, Odds ratio; CI, confidence interval; MSM, men who have sex with men; CDC, US Centers for Disease Control and Prevention; ART, antiretroviral therapy.

* Equivocals are grouped with the seronegatives. The reference category is positive.

** These variables were deleted during backward elimination.