Table 3

Variables significantly and not significantly associated with survival by univariate Cox regression analysis

  • FEV1 = forced expiratory volume in 1 second; FVC = forced vital capacity; TLC = total lung capacity; Tlco = carbon monoxide transfer factor; Kco= carbon monoxide transfer coefficient; Pao 2 = arterial oxygen tension; Paco 2 = arterial carbon dioxide tension; Sao 2 = oxygen saturation; HRCT = high resolution CT;t 0.5 F= half time for the fast component of the bi-exponential DTPA clearance curve; t 0.5 = half time for mono-exponential approximation to the early part of the DTPA clearance curve;t 0.5 S= half time for the fast component of the bi-exponential DTPA clearance curve; f F = fraction of tracer cleared by the fast component.