Table 1

Mean (SD) baseline characteristics and physiological responses to exercise testing of patients

ParameterShuttle testTreadmill testp value
Baseline characteristics
 Age (years)25 (7)
 Weight (kg)58 (8)
 Height (m)1.67 (0.008)
 FEV1 (% pred)49 (23)48 (25)0.31
 Sao 2 94 (3)94 (3)0.39
 Resting heart rate (beats/min)95 (12)97 (17)0.56
 Resting heart rate (% pred max)49 (7)50 (8)0.46
 Resting rating perceived breathlessness0 (1)0 (1)0.89
Physiological responses
 V˙o 2peak (ml/kg/min)32.85 (10.36)
 V˙o 2peak (% pred)73.45 (26.27)
 Vemax (l/min)57.76 (20.01)
 Ve (% pred)101 (40)
 MST distance (m)929 (335)
 Max heart rate (beats/min)171 (23)169 (24)0.90
 Max heart rate (% pred)87 (10)86 (11)0.95
 Peak rate perceived breathlessness6 (1)6 (1)0.90
 End Sao 2 89 (7)88 (7)0.10
  • FEV1 = forced expiratory volume in one second; Sao 2 = oxygen saturation;V˙o 2peak = peak oxygen consumption; Ve = minute ventilation; MST = modified shuttle test.