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Table 4 Comparison of crude and adjusted hazard ratios (95 % confidence interval) between the baseline and time-varying covariate (TVC) models for all 17 individual Charlson comorbidities

From: Effects of longitudinal changes in Charlson comorbidity on prognostic survival model performance among newly diagnosed patients with hypertension

Modeling Methods Baseline AICa TVC AIC
1. 17 Individual comorbidities (17 variables) 1,720,126 1,670,491
2. Original Charlson Weighting Method (1 variable) 1,723,116 1,679,069
3. Updated Charlson Weighting Method (1 variable) 1,724,610 1,677,164
4. Count of up to 17 comorbidities (1 variable) 1,724,769 1,691,347
  1. acHR crude hazard ratio AIC Akaike Information Criterion