From: COPD diagnosis related to different guidelines and spirometry techniques
 | ERS | NICE | GOLD |
---|---|---|---|
COPD diagnosis using only FVC (%) | 17.6 | 10.2 | 14.0 |
COPD diagnosis using best value of SVC and FVC (%) | 21.7 | 11.7 | 16.8 |
Reversibility among subjects with COPD (according to ERS, NICE and GOLD guidelines using the best of SVC and FVC) | |||
N | 861 | 446 | 652 |
Percent of predicted (mean; 95%CI) | 4.8 (4.4–5.1) | 5.5 (5.0–6.0) | 3.7 (3.3–4.2) |
Percent of pre-bronchodilator (mean; 95%CI) | 6.9 (6.3–7.5) | 9.2 (8.3–10.1) | 6.0 (5.3–6.7) |