Table 1– Quality scores for spirometric manoeuvres according to American Thoracic Society (ATS)/European Respiratory Society (ERS) standardisation [9, 10, 17]
ScoreDescription
A3 acceptable manoeuvres, and best 2 matched with differences in FVC and/or FEV1 <150 mL
B3 acceptable manoeuvres, and best 2 matched with differences in FVC and/or FEV1 <200 mL
C2 acceptable manoeuvres, and best 2 matched with differences in FVC and/or FEV1 <250 mL
D1 acceptable manoeuvre
F0 acceptable manoeuvres

  • A and B were considered high-quality spirometry; C was considered to represent high variability among manoeuvres. FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s.