Fig. 2: Proportion of patients with spirometry result FEV1/FVC or FEV1/VC above/equal to or under 0.70.
From: Diagnostic spirometry in COPD is increasing, a comparison of two Swedish cohorts
Patients with assessable spirometry data and performed diagnostic spirometries from COPD cohorts PRAXIS I (n = 295) and PRAXIS II (n = 567).
