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Table 1 Frequency of comorbid disease in validation cohort

From: Adaptation and validation of the Charlson Index for Read/OXMIS coded databases

Charlson Diagnostic category

Weighted score in Charlson index [6]

Number of patients in our dataset

AIDS

6

8 (0%)

Cerebrovascular disease

1

9,028 (4.4%)

Chronic pulmonary disease

1

27,698 (13.5%)

Congestive heart disease

1

9,217 (4.5%)

Dementia

1

3,624 (1.8%)

Diabetes

1

14,418 (7.0%)

Diabetes with complications

2

2,544 (1.2%)

Hemiplegia and paraplegia

2

505 (0.25%)

Mild liver disease

1

416 (0.2%)

Moderate or severe liver disease

3

96 (0.05%)

Myocardial infarction

1

6,512 (3.2%)

Peptic ulcer disease

1

6,943 (3.4%)

Peripheral vascular disease

1

6,731 (3.3%)

Renal disease

2

12,624 (6.1%)

Rheumatological disease

1

8,140 (3.9%)

Cancer

2

34,750 (16.9%)

Metastatic tumour

6

2,116 (1.0%)

No comorbid disease

-

60,585 (29.4%)

Total

205,955

  1. * Patients can be counted more than twice if they have more than one comorbid disease, therefore the total will not equal 146 441 (the number of patients in the cohort)