Emergency readmission following discharge from 140 English hospitals, 2002–2003. Results of a banding procedure that classifies institutions according to the thresholds indicated on the funnel plots
| Procedure | Band | |||||
|---|---|---|---|---|---|---|
| Alarm for high rate p<0.001 | Warning for high rate p<0.025 | No warning | Warning for low rate p<0.025 | Alarm for low rate p<0.001 | ||
| 1 | CHI bandings | 32 | 6 | 40 | 13 | 49 |
| 2 | Basic funnel plot | 31 | 6 | 37 | 19 | 47 |
| 3 | Clustering | 33 | 12 | 37 | 18 | 40 |
| 4 | Interval | 13 | 4 | 93 | 7 | 23 |
| 5 | Over-dispersion | 2 | 6 | 130 | 2 | 0 |
| 6 | Random effects | 4 | 8 | 101 | 21 | 6 |