Table 2.
Charlson index according to COPD severity
| Stage I N=43 |
Stage II N=167 |
Stage III N=362 |
Stage IV N=294 |
Total N=866 |
|
|---|---|---|---|---|---|
| Charlson scorea | 2.2 (2.2) | 2.3 (1.5) | 2.5 (1.6) | 2.7 (1.8) | 2.5 (1.7) |
| Comorbidity according to Charlson score | |||||
| No (score ≤1)a | 21 (46.5%) | 74 (44.4%) | 115 (31.8%) | 93 (31.5%) | 303 (35.0%) |
| Mild (score =2) | 14 (34.9%) | 40 (23.9%) | 107 (30.1%) | 66 (22.5%) | 227 (26.2%) |
| High (score ≥3)a | 8 (18.6%) | 53 (31.7%) | 140 (38.1%) | 135 (46%) | 336 (38.8%) |
Note:
a
Significant group differences (P<0.05) according to Mantel–Haenszel test.
Abbreviation: COPD, chronic obstructive pulmonary disease.