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Table 3 Internal validation and comparison of indices in predicting 1-year mortality in a matched cohort

From: Developing a comorbidity index for comparing cancer outcomes in Aboriginal and non-Aboriginal Australians

  All-cause mortality Cancer specific mortality
Models c-index AIC c-index AIC
BLa 0.678 428 0.689 376
BL + PCSCI 0.727 411 0.733 360
BL+ CCI 0.716 413 0.724 362
BL + WECI 0.719 416 0.724 368
BL + C3 0.720 420 0.731 366
  1. Abbreviations: BL baseline, CCI Charlson comorbidity index, WECI weighted Elixhauser comorbidity index, C3 cancer care and comorbidity index, PCSCI Population cancer specific comorbidity index
  2. aBaseline model adjusted for age, stage, stratified by (sex, year of birth, year of diagnosis and primary site)
  3. bBold entries represent best models