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

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

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