TABLE 3.
Impacts of MRSA and MSSA BSI on 30-day mortalitya
| Type of analysis | N | OR for effect measure (CI) | Effect measure and potential confounders in model |
|---|---|---|---|
| MRSA vs controls | |||
| Univariate | 661 | 4.8 (3.2-7.1) | BSI with MRSA |
| Multivariate | 533 | 4.4 (2.8-7.0) | BSI with MRSA, central venous catheter, peripheral vascular access, urinary catheter, >2 admissions in the previous yr, Charlson Comorbidity Index, and no. of indwelling devices |
| MSSA vs controls | |||
| Univariate | 1,614 | 3.3 (2.5-4.3) | BSI with MSSA |
| Multivariate | 1,590 | 2.4 (1.7-3.3) | BSI with MSSA, emergency admission, central venous catheter, urinary catheter, nasogastric tube, no. of indwelling devices |
| MRSA cohort vs MSSA cohort, comparison of multivariate effect estimates | 1.8 (1.04-3.2) | Methicillin resistance of S. aureus BSI |
a
Univariate and multivariate logistic regression and comparison of multivariate effect estimates from both cohorts.