Table 3. Scenarios using an average hospital case-mix distribution.
Number of hospitals changing ranks | |||||
Scenario | Number of hospitals changing category | No change | 1–5 ranks | 5–10 ranks | >10 ranks |
1 | 0 | 14 | 47 | 0 | 0 |
3 | 0 | 38 | 22 | 1 | 0 |
5 | 8 (3) | 10 | 41 | 5 | 5 |
7 | 3 (1) | 14 | 42 | 4 | 1 |
In scenario 1 and 5 the mean distribution of the case-mix variable under study of the 61 hospitals is used to recalculate the HSMR of the hospitals. In scenario 3 and 7 the HSMR of a hospital is recalculated using the mean distribution of the case-mix variable under study over time (2006–2009). In the second column the numbers of hospitals are shown for which the recalculated HSMR crosses a ‘control limit’. In brackets: the number of hospitals for which the HSMR lies close to a control limit (within 2 HSMR points). Columns 3 to 7 show an overview of rank changes of hospitals based on the recalculated HSMR.