Table 1. Incidence Rates of Healthcare-Related Pneumonia due to Methicillin-Resistant Staphylococcus aureus, Duke Infection Control Outreach Network, 2008–2012.
| Year | Cases | Patient-days | Crude incidence ratea | Adjusted incidence rate (95% CI)a,b | Incidence rate ratio (95% CI)b |
|---|---|---|---|---|---|
| 2008 | 146 | 1,202,434 | 12.1 | 11.3 (6.8–18.7) | Ref |
| 2009 | 183 | 1,172,374 | 15.6 | 14.6 (8.3–25.7) | 1.29 (0.91, 1.83) |
| 2010 | 232 | 1,167,885 | 19.9 | 18.5 (10.7–32.1) | 1.64 (1.07, 2.53) |
| 2011 | 212 | 1,126,537 | 18.8 | 17.5 (9.6–31.9) | 1.55 (1.03, 2.33) |
| 2012 | 182 | 1,095,048 | 16.6 | 15.5 (8.4–28.5) | 1.38 (0.92, 2.07) |
Note. CI, confidence interval; Ref, reference.
a
Cases per 100,000 patient-days.
b
Point estimates and 95% CIs obtained using generalized estimating equation with Poisson distribution, adjusting for within-hospital clustering of observations.