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Table 1 Positive predictive value (PPV) of the National Registry of Patients (NRP) first-listed ICD codes for the Charlson comorbidities

From: The predictive value of ICD-10 diagnostic coding used to assess Charlson comorbidity index conditions in the population-based Danish National Registry of Patients

Charlson condition Corresponding International Classification of Diseases, 10th revision codes Number of correct coded contacts/number reviewed PPV % (95% CI)* First-listed diagnoses
All Charlson conditions   931/950 98.0 (96.9 - 98.8)
Myocardial infarction I21;I22;I23 49/50 98.0 (89.4 - 99.9)
Congestive heart failure I50; I11.0; I13.0; I13.2 50/50 100 (92.9 - 100)
Peripheral vascular disease I70; I71; I72; I73; I74; I77 50/50 100 (92.9 - 100)
Cerebrovascular disease I60-I69; G45; G46 47/50 94.0 (83.5 - 98.7)
Dementia F00-F03; F05.1; G30 49/50 98.0 (89.4 - 99.9)
Chronic pulmonary disease J40-J47; J60-J67; J68.4; J70.1; 50/50 100 (92.9 - 100)
  J70.3; J84.1; J92.0; J96.1; J98.2; J98.3   
Connective tissue disease M05; M06; M08; M09;M30;M31; 49/50 98.0 (89.4 - 99.9)
  M32; M33; M34; M35; M36; D86   
Ulcer disease K22.1; K25-K28 49/50 98.0 (89.4 - 99.9)
Mild liver disease B18; K70.0-K70.3; K70.9; K71; K73; K74; K76.0 50/50 100 (92.9 - 100)
Diabetes mellitus E10.0, E10.1; E10.9 48/50 96.0 (86.3 - 99.5)
  E11.0; E11.1; E11.9   
Hemiplegia G81; G82 50/50 100 (92.9 - 100)
Moderate/severe renal disease I12; I13; N00-N05; N07; N11; N14; N17-N19; Q61 50/50 100 (92.9 - 100)
Diabetes mellitus with chronic complications E10.2-E10.8 41/50 82.0 (68.6 - 91.4)
  E11.2-E11.8   
Any tumor C00-C75 49/50 98.0 (89.4 - 99.9)
Leukemia C91-C95 50/50 100 (92.9 - 100)
Lymphoma C81-C85; C88; C90; C96 50/50 100 (92.9 - 100)
Moderate/severe liver disease B15.0; B16.0; B16.2; B19.0; K70.4; K72; K76.6; I85 50/50 100 (92.9 - 100)
Metastatic solid tumor C76-C80 50/50 100 (92.9 - 100)
AIDS B21-B24 50/50 100 (92.9 - 100)
  1. *When the PPV is 100%, a one-sided 97.5% confidence interval was estimated.