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 Log10HIV 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.

Drapeau et al. BMC Infectious Diseases 2007 7:36   doi:10.1186/1471-2334-7-36