Adjusted predictors of <i>S. aureus</i> infection within 180-days following surgery by type of index surgery based on incidence rate ratio (IRR).

Note: S. aureus denotes Staphylococcus aureus. S. aureus infection refers to first hospitalization coinciding or following surgery of interest with discharge diagnoses including any ICD-9 code specific for infection due to S. aureus. Rehab denotes rehabilitation; SNF denotes skilled nursing facility; ESRD denotes end-stage renal disease; NEast denotes northeast; MidAtlan denotes mid-Atlantic; COPD denotes chronic obstructive pulmonary disease; n.a. denotes not applicable, vs. denotes versus. IRR>1 denotes factor associated with higher risk; IRR<1 denotes lower risk. Each IRR regression was based on all cross-tabulated non-zero cells. Based on log likelihood ratio Chi-squared, the overall regression tests for all six procedures plus the pooled group were highly significant (p<0.0001). *denotes p<0.05. Adjusted predictors of S. aureus infection within 180-days following surgery by type of index surgery based on incidence rate ratio (IRR).