Risk-adjusted mortality rates and number (% of total) of hospitals by hospital mortality quartile in the early and late periods
| Early period | Late period | |||
| Quartile 1 (risk-adjusted rate 1.6%) | Quartile 2 (risk-adjusted rate 2.2%) | Quartile 3 (risk-adjusted rate 2.5%) | Quartile 4 (risk-adjusted rate 3.1%) | |
| Quartile 1 (risk-adjusted rate 2.6%) | 12 (9.7%) | 7 (5.7%) | 7 (5.7%) | 5 (4.0%) |
| Quartile 2 (risk-adjusted rate 2.9%) | 7 (5.7%) | 6 (4.8%) | 9 (7.3%) | 9 (7.3%) |
| Quartile 3 (risk-adjusted rate 3.2%) | 5 (4.0%) | 12 (9.7%) | 7 (5.7%) | 7 (5.7%) |
| Quartile 4 (risk-adjusted rate 3.6%) | 7 (5.7%) | 6 (4.8%) | 8 (6.5%) | 10 (8.1%) |