Validation and updating of risk models based on multinomial logistic regression

Table 5 Results of the closed testing procedure

Step	df	Temporal updating (SGH)	Geographical updating (QCCH)
1. Original model vs refitting	8	Δℓ = 241.6, p < 0.0001	Δℓ = 212.1, p < 0.0001
2. Intercept recalibration vs refitting	6	Δℓ = 169.1, p < 0.0001	Δℓ = 172.7, p < 0.0001
3. Logistic recalibration vs refitting	2	Δℓ = 20.2, p < 0.0001	Δℓ = 22.8, p < 0.0001

df degrees of freedom, SGH St. George’s Hospital, QCCH Queen Charlotte’s and Chelsea Hospital, Δℓ difference in −2 log-likelihood

ISSN: 2397-7523