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Table 3 Cox Analyses

From: A standard procedure for creating a frailty index

   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
  1. 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).
  2. a Analysis done with Age, Sex and Frailty Index as covariates