Table 3.

Parental Longevity Does Not Affect Survival After Age 100 Years

Variable	Hazard ratio (95% CI)	p
Paternal life span 80+ years	0.97 (0.91–1.04)	.405
Maternal life span 80+ years	0.95 (0.89–1.02)	.161
Female sex of centenarian	0.88 (0.83–0.95)	<.0001
Sibship size	1.00 (0.99–1.01)	.866
Birth year	1.01 (0.99–1.02)	.292

Note: Parameters of the Cox proportional hazards model for survival of 3 408 centenarians born in 1890–1897.