. 2016 Nov 22;16:671. doi: 10.1186/s12913-016-1910-8

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

Modeling Methods	Baseline AIC^a	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

^a cHR crude hazard ratio AIC Akaike Information Criterion