Table 1. Characteristics of 340 US hospitals and unadjusted associations between hospital characteristics and rates of methicillin-resistant Staphylococcus aureus (HA-MRSA) infection for discharges occurring between September 2015 and August 2016.
| Upper Bound | Mean or Percentage (95% CI) | Unadjusted Incidence Rate Ratio* (IRR) | 95% Confidence Interval of IRR | p-value* | |
|---|---|---|---|---|---|
| Lower Bound | Upper Bound | ||||
| PPRs (Mean %) | 62.73 (58.99, 66.46) | 0.973 | 0.968 | 0.979 | <0.001 |
| Teaching facility (%) | 21.87 (16.61, 28.24) | 1.353 | 0.837 | 2.187 | 0.208 |
| Rural location (%) | 20.94 (15.68, 26.19) | 2.919 | 1.865 | 4.571 | <0.001 |
| Ownership type (%) | |||||
| For-Profit | 47.44 (40.99, 53.88) | 1.000 (ref) | |||
| Public | 14.10 (9.61, 18.59) | 2.011 | 1.077 | 3.755 | 0.028 |
| Non-Profit | 38.46 (32.18, 44.74) | 1.687 | 1.121 | 2.539 | 0.012 |
| # Licensed beds (Mean) | 236.97 (200.77, 273.16) | 0.999 | 0.998 | 0.999 | 0.025 |
| Publicly insured or uninsured (Mean %) | 60.67 (58.61, 62.73) | 1.013 | 1.001 | 1.025 | 0.028 |
| Hispanic patients (Mean %) | 25.52 (22.56, 28.48) | 1.001 | 0.994 | 1.008 | 0.627 |
| Black patients (Mean %) | 10.36 (9.23, 11.49) | 1.019 | 1.003 | 1.034 | 0.013 |
| Physical space per bed in square feet (Mean) | 2565 (1933, 3197) | 0.634 | 0.433 | 0.929 | 0.019 |
| Mean Elixhauser score (Mean) | 2.90 (2.68, 3.13) | 1.064 | 0.969 | 1.168 | 0.190 |
| Nurse-to-patient ratio (Mean) | 0.964 (0.776, 1.152) | 0.976 | 0.819 | 1.162 | 0.789 |
| Major therapeutic procedures (Mean %) | 36.05 (33.95, 38.15) | 1.001 | 0.991 | 1.012 | 0.728 |
| Occupancy rate (Mean %) | 39.33 (37.00, 41.67) | 0.978 | 0.965 | 0.992 | 0.002 |
PPRs, private patient rooms.
* Unadjusted incidence rate ratios and p-values were generated using bivariate negative binomial logistic regression models.