Table 1

Comparison of baseline patient demographics by disease group

DemographicsCOPD (n=10)NMD-CWD (n=6)ORRF (n=12)p Value
Age (years)66±1058±2259±160.54
BMI (kg/m2)30.0±5.227.2±5.343.0±4.8<0.0001*
FEV1 (% predicted)31.1±11.332.7±11.352.5±20.2<0.01*
FVC (% predicted)52.4±9.730.5±10.755.6±19.0<0.01*
FEV1/FVC (% ratio)45.8±11.085.4±3.681.2±8.5<0.001*
PaO2 (kPa)7.6±1.49.2±0.68.3±1.0<0.03*
PaCO2 (kPa)7.9±1.06.6±1.07.1±0.9<0.04*
HCO3 (mmols/l)33.5±3.230.8±3.831.5±3.80.28
  • *A one-way analysis of variance was used to compare the demographics between disease groups, p value <0.05 was taken to represent statistical significance.

  • BMI, body mass index; HCO3, serum bicarbonate level; NMD-CWD, neuromuscular disease with or without chest wall disease; ORRF, obesity related respiratory failure; PaCO2, arterial carbon dioxide level; PaO2, arterial oxygen level.