Morbidity and mortality in centers with low (group A) and high (group B) numbers of cases/hospital
| Group A (n = 171) | Group B (n = 478) | P Value | |||
|---|---|---|---|---|---|
| No. | % (95% CI) | N. | % (95% CI) | ||
| Morbidity | 3 | 1.8 (0.4–4.7) | 8 | 1.7 (0.8–3.1) | .99 |
| Mortality | 4 | 2.3 (0.7–5.5) | 5 | 1.0 (0.4–2.3) | .25 |
| Total | 7 | 4.1 | 13 | 2.7 | .37 |