. Author manuscript; available in PMC: 2008 Oct 1.

Published in final edited form as: Exp Gerontol. 2007 May 29;42(10):963–970. doi: 10.1016/j.exger.2007.05.009

Table 2.

Cox multivariate proportional hazard regression models for 1- and 2-year follow-up periods for death events for all ages and for distinct age groups. Numbers show the logarithm of the relative risks, ln(RR), for a 1% increase of the Frailty Index (FI). Covariates included age, current Frailty Index (FI) value and the Frailty Index in the preceding survey (FI_P). Numbers in parentheses show Standard Errors of the ln(RR).

	Observation period, yrs.	All ages	Age groups
Sex	Observation period, yrs.	All ages	65−74	75−84	85−94	95+
Males	1	.039 (.004)	.045 (.011)	.043 (.006)	.026 (.008)	--
Males	2	.031 (.003)	.039 (.007)	.035 (.004)	.020 (.006)	--
Females	1	.041 (.004)	.068 (.012)	.042 (.005)	.039 (.006)	--
Females	2	.034 (.002)	.052 (.008)	.036 (.004)	.030 (.004)	.019^* (.009)

Note that p<.001;

p<.05.