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Table 2 Additional Charlson index comorbidities inferred from drug prescribing information (N = 247,712)

From: The predictability of claim-data-based comorbidity-adjusted models could be improved by using medication data

Comorbidities

Claim data1(A)

Prescribing information2(B)

Claim data ∩ Prescribing information3(A∩B)

Fraction of additional comorbidities inferred by prescribing information {(A∪B)-A}/(A∪B)

Peripheral vascular disease

6,707

21,858

2,452

74.3%

Congestive heart failure

4,531

4,159

946

41.5%

Chronic pulmonary disease

30,656

36,129

16,517

39.0%

Renal disease

8,298

1,054

400

7.3%

Cerebrovascular disease

8,196

638

153

5.6%

AIDS

51

10

8

3.8%

Connective tissue disease/rheumatic disease

2,727

114

72

1.5%

Dementia

3,811

261

216

1.2%

  1. 1 No. of cases of each Charlson index comorbidity identified from claim data, 2 No. of cases each Charlson index comorbidity inferred from drug prescribing information, 3 No. cases of each Charlson index comorbidity identified (or inferred) both claim data and drug prescribing information.