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Table 2 Resting pulmonary function tests in CF patients classified according to FEV 1

From: Determinants of exercise capacity in cystic fibrosis patients with mild-to-moderate lung disease

  All patients (n = 102) Group 1 (n = 48) Group 2 (n = 54)
FEV1   < 50% ≥ 50%
FEV1 a 60 ± 28 35 ± 9b 82 ± 18
FVCa 75 ± 24 56 ± 14b 93 ± 16
FEV1/FVC 65 ± 15 54 ± 11b 75 ± 10
RVa 176 ± 65 220 ± 50b 135 ± 48
DLCOa 68 ± 18 56 ± 13b 78 ± 14
PaO2, mm Hg 80 ± 14 71 ± 10b 87 ± 12
PaCO2, mm Hg 38 ± 4 38 ± 5 37 ± 4
P(A-a)O2, mm Hg 29 ± 13 38 ± 8b 21 ± 12
  1. aResults are expressed as mean ± SD percentage of predicted values.
  2. b P < .0001 compared with group 2.