Clinical Risk Factors for Gastroduodenal Ulcer in Romanian Low-Dose Aspirin Consumers

Table 4

Assessment of model performance.

Performance indices	Final multivariable model
Global measures of goodness-of-fit
Brier coefficient	0,15
(Nagelkerke)	0,43
Hosmer-Lemeshow goodness-of-fit test	= 5,26, df = 8, = 0,73
Comparison of nested models tested
Likelihood ratio test (full model versus constant model)	= 50,98, df = 15, < 0,001
Likelihood ratio test (full model versus reduced model)	,56, df = 9, = 0,307
Discrimination
stat (95% CI: lower-upper limit)	0,85 (95% CI: 0,79–0,92)
Somers’ index	0,71
Discrimination slope	1,00

Note. Full model: model with all potential candidates from univariate regression analysis.
Constant model: null model.
Reduced model: final model.