Table 2 Fraction of new prognostic information from including frailty in the model
Fraction of new information | p value (likelihood ratio test) | |||
|---|---|---|---|---|
ICU mortality model (%) | 30-day mortality model (%) | ICU mortality model | 30-day mortality model | |
Categorisation | 3 | 9 | < 0.001 | < 0.001 |
Linear | 2 | 8 | < 0.001 | < 0.001 |
Nonlinear | 3 | 9 | < 0.001 | < 0.001 |
Simplified grouping | 1 | 6 | 0.002 | < 0.001 |
Dichotomisation | 1 | 5 | < 0.001 | < 0.001 |