Table 3
Poor agreement between the quartile classes of predicted in-hospital mortality and hospitalisation costs
| Predicted hospitalisation costs* | ||||||
|---|---|---|---|---|---|---|
Low  high | ||||||
| n (%) | Class 1 | Class 2 | Class 3 | Class 4 | Total | |
| Predicted in-hospital mortality* | ||||||
Low
High | Class 1 | 1243 (6.2) | 1415 (7.1) | 1209 (6.1) | 1014 (5.1) | 4881 (24.5) |
| Class 2 | 1672 (8.4) | 1250 (6.3) | 1054 (5.3) | 1104 (5.5) | 5080 (25.5) | |
| Class 3 | 1380 (6.9) | 1394 (7.0) | 1036 (5.2) | 1174 (5.9) | 4984 (25.0) | |
| Class 4 | 692 (3.5) | 908 (4.6) | 1689 (8.5) | 1692 (8.5) | 4981 (25.0) | |
| Total | 4987 (25.0) | 4967 (24.9) | 4988 (25.0) | 4984 (25.0) | 19 926 (100.0) | |
Numbers in parentheses indicate percentages of the total; Cohen's κ=0.016, p<0.0001.
Class1: below the lower quartile; class 2: between the lower quartile and median; class 3: between median and upper quartile; class 4: above upper quartile.
*Model 2 of in-hospital mortality and model 3 of hospitalisation costs were used for prediction.