FEV1/FVC <0.70 | FEV1/FVC <LLN | |
Subjects | 80 | 55 |
GOLD grading | ||
Mild (>80% predicted) | 51.2 | 40.0 |
Moderate (50–80% predicted) | 42.5 | 50.9 |
Moderately severe (30–50% predicted) | 6.3 | 9.1 |
Severe (<30% predicted) | 0.0 | 0.0 |
z-score-based grading | ||
Mild (z-score > −2) | 70.0 | 60.0 |
Moderate (z-score −2 to −2.5) | 8.8 | 9.1 |
Moderately severe (z-score −2.5 to −3) | 10.0 | 14.5 |
Severe (z-score −3 to −4) | 11.3 | 16.4 |
Very severe (z-score < −4) | 0.0 | 0.0 |
Data are presented as n or % of subjects with airflow limitation.