Baseline characteristics of hospitalized older patients according to gender.

*continuous variables;†categorical variables; pm = person-month; py = person-years; ir = incidence rate.**p-values obtained fitting generalized linear mixed-effects models, using variable rank values, accounting for clustering due to centre effect.††Excluding cerebrovascular disease.FI-SOF: Frailty Index derived from the Study of Osteoporotic Fractures; FI-CD: Frailty Index based on cumulative deficits; FI-CGA: Frailty Index based on a Comprehensive Geriatric Assessment; ADL: activities of daily living; IADL: instrumental activities of daily living; SPMSQ: Short Portable Mental Status Questionnaire; CIRS: Cumulative Illness Rating Scale; MNA: Mini Nutritional Assessment;ESS: Exton-Smith Scale; MPI: Multidimensional Prognostic Index.