From: COPD Clinical Control: predictors and long-term follow-up of the CHAIN cohort
Total (n = 798) | FEV1 ≥ 50% (n = 498) | FEV1 < 50% (n = 300) | P-value | |
---|---|---|---|---|
Clinical impact | < 0.001 | |||
Low, n (%) | 546 (68.4) | 318 (63.9) | 228 (76.0) | |
High, n (%) | 252 (31.6) | 180 (36.1) | 72 (24.0) | |
Stability | ||||
Stable, n (%) | 362 (45.4) | 262 (52.6) | 100 (33.3) | |
Not stable, n (%) | 436 (54.6) | 236 (47.4) | 200 (66.7) | < 0.001 |
Control status | ||||
Controlled, n (%) | 264 (33.0) | 184 (36.9) | 80 (26.7) | |
Uncontrolled, n (%) | 534 (67.0) | 314 (63.1) | 220 (73.3) | 0.003 |