Table 4

Lung function data

PAH+ (n=12)PAH– (n=32)p value
VC (% pred)87 (14)105 (20)0.005
FEV1 (% pred)82 (14)101 (17)0.001
FEV1/VC (%)73 (7)75 (7)NS
MEF25–75 (% pred)75 (32)94 (26)NS
ERV (% pred)40 (16)77 (41)0.003
RV (% pred)90 (12)90 (25)NS
TLC (% pred)87 (13)98 (18)0.048
  • VC = vital capacity; FEV1 = forced expiratory volume in one second; MEF25–75 = maximal expiratory flow between 25% and 75% of vital capacity; ERV = expiratory reserve volume; RV = residual volume; TLC = total lung capacity; PAH = pulmonary arterial hypertension.