Isn't that hereditary? Isn't it possible to look at relatives and parents and guess own future?
Genetics Twin studies have estimated that approximately 20-30% the variation in human lifespan can be related to genetics, with the rest due to individual behaviors and environmental factors which can be modified.
[Hjelmborg, J.; Skytthe, Axel; Vaupel, James W.; McGue, Matt; Koskenvuo, Markku; Kaprio, Jaakko; Pedersen, Nancy L.; Christensen, Kaare et al. (2006). "Genetic influence on human lifespan and longevity". Human Genetics 119 (3): 312–321. doi:10.1007/s00439-006-0144-y.]