Subjects with Discordant Airways Obstruction: Lost between Spirometric Definitions of COPD

Table 2

Airways obstruction defined by postbronchodilator FEV1/FVC < 0.70 and FEV1/FVC < LLN.

	FEV1/FVC < 0.70 (𝐧=𝟑𝟎𝟒)	FEV1/FVC ≥ 0.70 (𝐧=𝟗𝟓𝟒)
FEV1/FVC < LLN (𝐧=𝟏𝟗𝟗)	192 (63.2%)	7 (0.7%)
FEV1/FVC ≥ LLN (𝐧=𝟏𝟎𝟓𝟗)	112 (36.8%)	947 (99.3%)