Table 2.

Spirometry results and COPD (n= 95)

Measure of lung function	Median (IQR) or N (%)
FEV1, L	2.1 (1.7, 2.6)
FEV1 ≥ 80% of predicted	36 (38%)
FEV1 50–79% of predicted	47 (49%)
FEV1 30–49% of predicted	12 (13%)
FEV1 < 30% of predicted	0 (0%)
FEV1 percent predicted	74.9 (62.4, 88.9)
FVC, L	2.9 (2.4, 3.3)
FVC percent predicted	81.9 (69.0, 89.8)
FEV1/FVC ratio	0.78 (0.70, 0.83)
FEV1/FVC ratio percent predicted	93.5 (84.1, 101.7)
FEV1/FVC < LLN	29 (31%)
FEV1/FVC < 0.70 (COPD)	22 (23%)
FEV1 ≥ 80% of predicted	0 (0%)
FEV1 50–79% of predicted	12 (55%)
FEV1 30–49% of predicted	10 (45%)
FEV1 < 30% of predicted	0 (0%)

COPD chronic obstructive pulmonary disease, LLN lower limit of normal