Table 2 Characteristics of the update methods and number of parameters estimated in the case study of prediction of prostate cancer at biopsy
From: Improving prediction models with new markers: a comparison of updating strategies
Method | Data required | Nr. Parameters estimated | Nr. Parameters estimated in case study |
|---|---|---|---|
Original Model | No data | 0 | 0 |
Model Revision with extension | Marker set | p + m + 1 | 5 |
Model Revision with shrinkage | Marker set | p + m + 1 | 5 |
Recalibration and extension | Marker set | m + 2 | 3 |
CLR | Marker set | 2 m (p + 1) + m (m + 1) | 10 |
CLR simple | Marker set | m (p + 2) + m (m + 1)/2 | 6 |
Imputation | Development and marker | p + m + 1 | 5 |