Abstract P6 Table 1

Patient data comparing physiological changes following initiation of NIV

CharacteristicPure obesityOverlap syndrome
BMI (kg/m2)54504339
Weight (kg)146134112103
Po2 (kPa)6.28.346.67.2
Pco2 (kPa)
FEV1 (% pred)
FVC (% pred)
FEV1/FVC (%)75.971.458.759.1
FRC (% pred)66.077.897.9112.3
TLC (% pred)
RV (% pred)86.692.0118.4130.7
Tlco (% pred)97.291.574.369.2
Kco (% pred)123.5113.2107.599.5
  • BMI, body mass index; FEV1, forced expiratory volume in 1 s; FRC, functional residual capacity; FVC, forced vital capacity; Kco, carbon monoxide transfer coefficient; NIV, non-invasive ventilation; Pco2, Po2, carbon monoxide and oxygen tensions; RV, residual volume; TLC, total lung capacity; Tlco, carbon monoxide lung transfer factor.