Table 3 Multivariable logistic regression of factors associated with polymicrobial Staphylococcus aureus bloodstream infections
Variable | Unadjusted OR(95%CI) | p-value | Adjusted OR(95%CI) | p-value |
|---|---|---|---|---|
Co-morbidities | ||||
 Trauma | 2.42 (1.29,4.56) | 0.01 |  |  |
 Burn injury | 3.40 (1.68,6.88) | 0.00 | 7.04 (1.71,28.94) | 0.01 |
 Cerebrovascular accident | 2.44 (1.13,5.26) | 0.02 |  |  |
APACHE II score | 1.08 (1.04,1.12) | 0.00 | Â | Â |
SOFA score | 1.11 (1.04,1.18) | 0.00 | Â | Â |
Pitt Bacteremia Score | 1.29 (1.15,1.44) | 0.00 | Â | Â |
ICU stay | 5.16 (2.74,9.72) | 0.00 | Â | Â |
Previous treatment | ||||
 Parenteral nutrition | 3.02 (1.67,5.47) | 0.00 |  |  |
 Previous surgery | 3.21 (1.77,5.83) | 0.00 |  |  |
 Prior Blood transfusion | 4.44 (2.32,8.47) | 0.00 | 2.72 (1.14,6.50) | 0.03 |
 Central venous catheter | 2.28 (1.24,4.16) | 0.01 |  |  |
 Mechanical ventilation | 5.76 (3.09,10.75) | 0.00 | 3.11 (1.16,8.30) | 0.02 |
 Indwelling urinary catheter | 4.83 (2.40,9.73) | 0.00 |  |  |
Nosocomial infection | 9.84 (2.34,41.34) | 0.00 | Â | Â |
Prior hospital stay | 1.02 (1.01,1.03) | 0.01 | 1.02 (1.00,1.03) | 0.02 |
Source of BSIs | ||||
 Pneumonia | 2.62 (1.44,4.78) | 0.00 | 4.22 (1.69,10.51) | 0.00 |
 Central venous catheter | 0.31 (0.11,0.88) | 0.03 |  |  |
MRSA | 2.36 (1.14,4.88) | 0.02 | Â | Â |