Table 2. Adjusted associations between the characteristics of 340 US hospitals and rates of methicillin-resistant Staphylococcus aureus (HA-MRSA) infections for discharges between September 2015 and August 2016.
| Variable | Adjusted Incidence Rate Ratio (aIRR)* | 95% Confidence Interval of aIRR | p-value* | |
|---|---|---|---|---|
| Lower Bound | Upper Bound | |||
| PPR (%) | 0.992 | 0.991 | 0.994 | <0.001 |
| Teaching facility | 1.257 | 1.102 | 1.434 | 0.001 |
| Rural location (%) | 1.072 | 0.918 | 1.252 | 0.380 |
| Ownership type (%) | ||||
| For-Profit | 1.000 (ref) | |||
| Public | 1.235 | 1.070 | 1.425 | 0.004 |
| Non-Profit | 1.129 | 1.021 | 1.250 | 0.019 |
| # Licensed beds (log-transformed) | 1.616 | 1.524 | 1.713 | <0.001 |
| Publicly insured or uninsured patients (%) | 1.003 | 1.000 | 1.006 | 0.049 |
| Hispanic patients (%) | 1.000 | 0.998 | 1.002 | 0.949 |
| Black patients (%) | 1.006 | 1.001 | 1.010 | 0.009 |
| Physical space per bed in square feet (log-transformed) | 0.941 | 0.885 | 1.002 | 0.056 |
| Mean Elixhauser score | 1.034 | 1.002 | 1.068 | 0.038 |
| Nurse-to-patient ratio (log-transformed) | 0.536 | 0.892 | 0.356 | <0.001 |
| Major therapeutic procedures (%) | 1.007 | 1.004 | 1.011 | <0.001 |
| Occupancy rate (%) | 1.012 | 1.009 | 1.016 | <0.001 |
PPR, private patient room.
* Adjusted incidence rate ratios and p-values were generated using a multivariable negative binomial logistic regression model.