Table 1.

Main Characteristics of the 1,614 Individuals Investigated

Age (years)	79.1±13.1
Male/female (n(%))	699 (43.3)/915 (56.7)
In-hospital death (n(%))	224 (13.9)
Serum creatinine>3 mg/dl (n(%))	126 (7.8)
Independency in activities of daily living	2.64±2.58
Albumin (g/dl)	3.1±0.6
Modified Elixhauser score calculated from electronic medical charts	24.43±11.27
Modified Elixhauser score calculated from administrative data recorded at the time of discharge	18.13±9.36
Prognostic index derived from clinical data from Cei et al	7.63±3.3