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Table 1 Agreements between medical records and claims data (unit = n (%))

From: A comparison of the Charlson comorbidity index derived from medical records and claims data from patients undergoing lung cancer surgery in Korea: a population-based investigation

Comorbidity Prevalence medical records data Prevalence administrative data Agreement between data sources (Medical record/Administrative data) Kappa(SE) Agreement rate
    Yes/Yes No/No Yes/No No/Yes   
Myocardial infarction 4(1.0) 5(1.3) 1(0.3) 384(98.0) 3(0.8) 4(1.0) 0.213(0.050) 98.21
Congestive heart failure 1(0.3) 9(2.3) 0(0.0) 382(97.4) 1(0.3) 9(2.3) NAc 97.45
Peripheral vascular disease 1(0.3) 11(2.8) 0(0.0) 380(96.9) 1(0.3) 11(2.8) NAc 96.94
Cerebrovascular disease 23(5.9) 21(5.4) 11(2.8) 359(91.5) 12(3.1) 10(2.6) 0.473(0.050) 94.39
Dementia 0(0.0) 0(0.0) 0(0.0) 392(100.0) 0(0.0) 0(0.0) NAb 100.00
Chronic pulmonary disease 29(7.4) 138(35.2) 17(4.3) 242(61.7) 12(2.1) 121(30.9) 0.093(0.034) 66.07
Rheumatic disease 3(0.8) 10(2.6) 1(0.3) 380(96.9) 2(0.5) 9(2.3) 0.144(0.042) 97.19
Peptic ulcer disease 13(3.3) 91(23.2) 4(1.0) 292(74.5) 9(2.3) 87(22.1) 0.020(0.031) 75.51
Mild liver disease 9(2.3) 43(11.7) 6(1.5) 343(87.5) 3(0.8) 40(10.2) 0.187(0.036) 89.03
Diabetes without chronic complication 53(13.5) 15(3.8) 11(2.8) 335(85.5) 42(10.7) 4(1.0) 0.281(0.041) 88.27
Diabetes with chronic complication 6(1.5) 21(5.4) 3(0.8) 368(93.9) 3(0.8) 18(4.5) 0.203(0.041) 94.64
Hemiplegia or paraplegia 1(0.3) 1(0.3) 0(0.0) 390(99.5) 1(0.3) 1(0.3) NAc 99.49
Renal disease 2(0.5) 0(0.0) 0(0.0) 390(99.5) 2(0.5) 0(0.0) NAa 99.49
Any malignancy, except malignant neoplasm of the skin 10(2.6) 11(2.8) 4(1.0) 375(95.7) 6(1.5) 7(1.8) 0.364(0.050) 96.68
Moderate or severe liver disease 2(0.5) 1(0.3) 0(0.0) 389(99.2) 2(0.5) 1(0.3) NAc 99.23
Metastatic solid tumor 0(0.0) 1(0.3) 0(0.0) 391(99.7) 0(0.0) 1(0.3) NAa 99.74
AIDS/HIV 0(0.0) 0(0.0) 0(0.0) 392(100.0) 0(0.0) 0(0.0) NAb 100.00
  1. aComorbidity was present in only one source; bComorbidity was absent in both sources; cThe cell frequency is 0.