| Comorbidity Index | Characteristics | LE; GR |
|---|---|---|
| Charlson Index | – Generic; 17 conditions (in 19 categories); severity 1–6 (based on impact on 1-yr mortality); scoring method: sum of weighted conditions; scoring range 0–33; duration 30–60 min. | LE 2b; GR B |
| Elixhauser Comorbidity Index | – Generic; 30 conditions included individually; scoring method: sum of conditions or weighted conditions; duration >60 min. | LE 2b; GR B |
| Index of co-existent disease | – Generic; 14 systems, 10 functional; severity 0–4 for comorbidity and 0–2 for function; scorng methos: combined highest scores of two dimensions; scoring range (0–3); duration >60 min. | LE 2b; GR B |
| Functional Comorbidity Index | – Generic; 18 comorbilidades, puntuaciόn como sumatorio (0–18); duration 5–15 min. | LE 2b; GR B |
| Self-administered comorbidity questionnaire | – Generic; 13 conditions, extra diseases could be added; each condition has 3 domains (yes/o response; scoring method: sum of domains; scoring range (0-45); duration 5-15 min. | LE 2b; GR B |
Abbreviations: LE, level of evidence; GR, grade de recommendation; yr, year; min, minutes.