Table 3

Cox Analyses

Cox Analyses

Baseline

Follow up

Analysis

Variable

HR

95% CI

HR

95% CI


Bi-variate

Age

1.09

1.07 – 1.11

1.09

1.06 – 1.11

Frailty Index

1.03

1.02 – 1.04

1.05

1.04 – 1.05

Male Sex

1.46

1.16 – 1.82

1.37

1.07 – 1.74

Multi-variatea

Age

1.08

1.06 – 1.10

1.06

1.04 – 1.09

Frailty Index

1.03

1.02 – 1.04

1.04

1.04 – 1.05

Male Sex

1.80

1.42 – 2.27

1.71

1.33 – 2.20


Cox Regression analyses of the baseline and follow up. Calculations were based on monthly follow ups for nine years from the baseline interview (or seven and a half years from the 18 month follow up). The frailty index hazard ratios (HR) are calculated with % levels of the index (i.e. the HR measures a change of 0.01 on the index).

a Analysis done with Age, Sex and Frailty Index as covariates

Searle et al. BMC Geriatrics 2008 8:24   doi:10.1186/1471-2318-8-24

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