Role of previous hospitalization in clinically-significant MRSA infection among HIV-infected inpatients: results of a case-control study

Table 1 Risk factors for CS-MRSA^ infection in HIV infected patients. Multivariate analysis.

	Cases n = 27	Controls n = 54	Univariate analysis				Multivariate analysis
			Odds Ratio§	95% CI^^		p*	Odds Ratio§	95% CI^^		p*
HIV risk factor, n (%)
IDU (intravenous drug user)	15	31	1.00	-	-	-	-	-	-	-
Homosexual	2	7	0.50	0.08	3.02	0.449	-	-	-	-
Heterosexual	5	7	1.70	0.41	6.97	0.463	-	-	-	-
Unknown	5	9	1.18	0.33	4.22	0.801	-	-	-	-
Cumulative hospital stay (days) in the previous year
(per an increase of 5 days)	-	-	1.11	1.02	1.22	0.020	1.14	1.01	1.29	0.041
Outpatient visits in the previous year
0–1	17	19	1.00	-	-	-	1.00	-	-	-
more than 1	10	35	0.34	0.13	0.92	0.034	0.26	0.07	1.01	0.051
Any invasive procedure in the previous year**
No	17	51	1.00	-	-	-	1.00	-	-	-
Yes	10	3	8.92	1.93	41.31	0.005	9.14	1.31	63.73	0.025
Median CD4 cell count previous half year (cells/μl)
0–199	20	22	1.00	-	-	-	1.00	-	-	-
≥ 200	7	32	0.24	0.08	0.73	0.013	0.22	0.05	1.00	0.050
Median Log ₁₀ HIV plasma viral load (cp/ml) in the previous half year***
≤ 2.99	9	14	1.00	-	-	-	-	-	-	-
≥ 3	17	39	0.69	0.25	1.92	0.478	-	-	-	-
Any ARV therapy in previous 6 months
No	17	41	1.00	-	-	-	-	-	-	-
Yes	10	13	1.86	0.65	5.29	0.245	-	-	-	-
Any cotrimoxazole in the previous 4 months
No	19	49	1.00	-	-	-	-	-	-	-
Yes	8	5	3.06	0.99	9.41	0.051	-	-	-	-

^ CS = clinically significant methicillin-resistant Staphylococcus aureus
^^ 95% confidence intervals
§ All Estimates are adjusted for age at enrolment (< = 42 years and >42 years of age)
* Wald test
** It Includes surgery, dialysis or a permanent indwelling catheter or percutaneous medical device.
*** Only 77 patients considered; 2 patients not added up to total for missing values.

ISSN: 1471-2334