A survey of a centenarian population in Italy, focusing on self-sufficiency and cognition

Eighty-six persons aged 100 years or older (20 males and 66 females) living in urban areas of different Italian regions were examined between 1985 and 1992, aimed at describing the characteristics of centenarians in an entire population. The female/male ratio was 4 to 1, and 69% of the centenarians lived at home. Body mass index was 21.3 in females and 24.5 in males. The subjects typically reported no major diseases, only a few hospital admittances (1.2/lifetime) and a limited use of regular medication (on average: 1.4 drugs). The mothers and fathers of the centenarians lived 76.2 and 74.2 years, respectively. The Activities of Daily Living scale revealed a decrease in instrumental activities, and an adequate self-maintenance in the majority of centenarians; a full score on the Physical Self Maintenance Scale was reached by 10% of the subjects; these scores were not significantly influenced by the isolated sensory deficits but were lower in patients with multiple impairments. The Mini Mental State Examination score was overall 17.7 +/- 8.3 for the group, reaching 24.1 in male and 20.2 in female literate subjects without major hearing or vision defects; these scores varied significantly in relation to sensory deficits and education. In our centenarian population males reached extreme old age less frequently, but with a better quality of life, than females. The good overall performance of the whole population, and especially of the subpopulation without impairments, suggests a selective survival of centenarians, as also demonstrated by the long lifespan of their immediate relatives.