Miceli, Rosalba; Lusa, Lara; Mariani, Luigi - In: Journal of Applied Statistics 31 (2004) 7, pp. 817-830
A prognostic index (PI) is usually derived from a regression model as a weighted mean of the covariates, with weights (partial scores) proportional to the parameter estimates. When a PI is applied to patients other than those considered for its development, the issue of assessing its validity on...