Table 4—

Pulmonary function test results

UDPControlp-value
FEV1 % pred62.5±16.699.0±13.1<0.001
VC % pred74.4±18.4102.3±22.80.005
FEV1/VC ratio %71.3±10.580.8±5.20.014
VC drop# %20.7±5.76.4±4.7<0.001
Pa,O2 kPa10.08±1.1912.10±1.420.002
Pa,CO2 kPa4.92±0.335.07±0.450.389
  • Data are presented as mean±sd, unless otherwise stated. UDP: unilateral diaphragm paralysis or severe weakness; FEV1: forced expiratory volume in one second; % pred: % predicted; VC: vital capacity; Pa,O2: arterial oxygen tension; Pa,CO2: arterial carbon dioxide tension. #: fall in VC when changing from sitting to supine position; : patient no. eight was excluded due to inability to perform the manoeuvre.