Table 2—

Lung function measures as absolute values and as percentage of predicted values

Absolute measures
Percentage predicted
BaselineFollow-upChangeEquationBaselineFollow-upChange
FVC3.20 ± 0.892.72 ± 0.83*−0.48 ± 0.51Knudson94.3 ± 19.386.4 ± 18.9*−7.7 ± 17.8
Busselton90.1 ± 16.983.4 ± 17.7*−6.7 ± 16.2
FEV12.58 ± 0.782.08 ± 0.70*−0.50 ± 0.51Knudson94.7 ± 22.083.7 ± 22.1*−10.8 ± 20.5
Busselton94.2 ± 21.384.5 ± 22.2*−9.7 ± 21.1
VC3.15 ± 0.792.54 ± 0.85*−0.58 ± 0.66Knudson92.9 ± 17.781.6 ± 20.1*−10.9 ± 19.4
PEF378 ± 129260 ± 122*−118 ± 109Knudson87.7 ± 24.666.2 ± 26.8*−21.5 ± 26.8
  • Data are means ± SD. Absolute units of measurement were liters for FVC, FEV1, and VC and liters per minute for PEF. For FVC and FEV1, the percentage of predicted values are shown for both the Knudson and Busselton equations.

  • *

    * P < 0.001 versus baseline.