Feasibility of coding-based Charlson comorbidity index for hospitalized patients in China, a representative developing country

Table 2 Correlation coefficient and κ statistic between ICD-based and diagnosis-based CCI

Items of the Charlson comorbidity scoring system	correlation coefficient	κ(95% CI)	P value
Myocardial infarction	0.836	0.826 (0.824, 0.828)	0.001
Congestive heart failure	0.816	0.805 (0.803, 0.807)	0.001
Peripheral vascular disease	0.221	0.210 (0.208, 0.212)	0.001
Cerebrovascular disease	0.897	0.897 (0.897, 0.897)	< 0.001
Dementia	0.907	0.907 (0.903, 0.911)	0.002
Chronic pulmonary disease	0.885	0.883 (0.881, 0.884)	0.001
Rheumatologic disease	0.788	0.770 (0.766, 0.774)	0.002
Peptic ulcer disease	0.814	0.807 (0.803, 0.811)	0.002
Mild liver disease	0.603	0.595 (0.593, 0.597)	0.001
Diabetes without chronic complication	0.935	0.934 (0.934, 0.934)	< 0.001
Hemiplegia	0.401	0.292 (0.284, 0.300)	0.004
Renal disease	0.854	0.851 (0.849, 0.852)	0.002
Diabetes with chronic complication	0.918	0.918 (0.916, 0.920)	0.001
Tumor	0.828	0.821 (0.819, 0.822)	0.001
Leukemia	0.730	0.710 (0.701, 0.716)	0.002
Lymphoma	0.921	0.920 (0.918, 0.922)	0.001
Moderate or severe liver disease	0.465	0.451 (0.445, 0.457)	0.003
Metastatic solid tumor	0.813	0.797 (0.795, 0.799)	0.001
AIDS	0.934	0.932 (0.924, 0.940)	0.004

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