Table S1.
Coding algorithm used for comorbid conditions in the Charlson Comorbidity Index
| Comorbid condition in CCI | ICD-8 | ICD-10 | Score |
|---|---|---|---|
| Myocardial infarction | 410 | I21, 122, I23 | 1 |
| Congestive heart failure | 427.09, 427.10, 427.11, 427.19, 428.99, 782.49 | I50, I11.0, I13.0, I13.2 | 1 |
| Peripheral vascular disease | 440–445 | I70–I74, I77 | 1 |
| Cerebrovascular disease | 430–438 | I60–I69, G45, G46 | 1 |
| Dementia | 290.09–290.19, 293.09 | F00–F03, F05.1, G30 | 1 |
| Chronic pulmonary disease | 490–493, 515–518 | J40–J47, J60–J67, J68.4, J70.1, J70.3, J84.1, J92.0, J96.1, J98.2, J98.3 | 1 |
| Connective tissue disease | 712, 716, 734, 446, 139.99 | M05, M06, M08, M09, M30–M36, D86 | 1 |
| Ulcer disease | 530.91, 530.98, 531–534 | K22.1, K25–K28 | 1 |
| Diabetes mellitus type 1 and 2 | 249.00, 249.06, 249.07, 249.09, 250.00, 250.06, 250.07, 250.09 | E10.0, E10.1, E10.9, E11.0, E11.1, E11.9 | 1 |
| Hemiplegia | 344 | G81, G82 | 2 |
| Moderate to severe renal disease | 403, 404, 580–584, 590.09, 593.19, 753.10–753.19, 792 | I12, I13, N00–N05, N07, N11, N14, N17–N19, Q61 | 2 |
| Diabetes mellitus type 1 and 2 with end organ damage | 249.01–249.05, 249.08, 250.01–250.05, 250.08 | E10.2–E10.8, E11.2–E11.8 | 2 |
| Any tumor | 140–194 | C00–C75 | 2 |
| Leukemia | 204–207 | C91–C95 | 2 |
| Lymphoma | 200–203 | C81–C85, C88, C90, C96 | 2 |
| Metastatic solid tumor | 195–199 | C76–C80 | 6 |
| AIDS | 79.83 | B21–B24 | 6 |
| Mild liver disease* | 571, 573.01, 573.04 | B18, K70.0–K70.3, K70.9, K71, K73, K74, K76.0 | 1 |
| Moderate to severe liver disease* | 70.00, 70.02, 70.04, 70.06, 70.08, 573.00, 456 | B15.0, B16.0, B16.2, B19.0, K70.4, K72, K76.6, I85 | 3 |
Note:
*
The liver diseases of the CCI were not included in our comorbidity score, as they were considered as being part of the causal pathway of mortality.
Abbreviations: CCI, Charlson Comorbidity Index; ICD, International Classification of Diseases.