Table 3 Cardiopulmonary exercise 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% |
VO2 peak, mL/kg/min | 25 ± 9 | 20 ± 5d | 30 ± 8.5 |
VO2 peaka | 65 ± 21 | 51 ± 13d | 77 ± 20 |
Borg dyspnea | 4.7 ± 1.9 | 5.6 ± 2b | 4.1 ± 1.5 |
Borg Leg fatigue | 4.5 ± 1.8 | 5.2 ± 1.8b | 4.4 ± 1.7 |
VE peak, L/min | 58 ± 22 | 44 ± 11d | 70 ± 21 |
RR peak, min | 41 ± 9 | 43 ± 9b | 39 ± 8 |
VT/FVC peak, % | 48 ± 11 | 47 ± 13 | 48.6 ± 8 |
VE/VO2 peak | 41 ± 7 | 42 ± 7 | 41 ± 7 |
VE/VCO2 peak | 36 ± 6 | 37 ± 6 | 35 ± 5 |
BR, % | 24 ± 20 | 8 ± 11d | 37.5 ± 16 |
VD/VT peak | 0.32 ± 0.11 | 0.39 ± 0.07d | 0.25 ± 0.10 |
pH peak | 7.34 ± 0.04 | 7.34 ± 0.04 | 7.35 ± 0.04 |
PaO2 peak, mm Hg | 76 ± 16 | 63 ± 10d | 89 ± 12 |
PaCO2 peak, mm Hg | 40 ± 7 | 44 ± 6d | 36 ± 4 |
P(A-a)O2 peak, mm Hg | 37 ± 13 | 46 ± 8d | 28 ± 10 |
Lactatemia peak, mmol/L | 7 ± 2.6 | 6 ± 2d | 7.9 ± 3 |
HR peaka | 82 ± 10 | 79 ± 8d | 86 ± 9 |
VO2/HR peaka | 79 ± 22 | 67 ± 16d | 90 ± 21 |