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

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