Familial transmission of human longevity: a population-based study in an inland village of Sardinia (Italy), 1850–2010

This study investigates the role of familial transmission on individual survival in an inland community of Sardinia that stands for the exceptional longevity of its inhabitants. The analysis considers the complete survival trajectories of individuals born in the village of Villagrande Strisaili from unions in the period from 1850 to 1910 and aims to estimate the possible effect on the relationships parent–offspring and between siblings. Our results show that the frail familial component of the population, rather than the robust one, proves to be a good predictor of individual survival. No association between father survival and that of children was found. Having instead a long-living mother increases lifespan, especially for daughters. But the strongest relationship is that observed between siblings. The survival of siblings is positively associated with individual survival and this relationship is particularly strong for males. This finding points for both genetic and environment influence, and particularly of early-life conditions, on longevity