TABLE 2

Comparison of changes in variables obtained from CWR exercise testing between the intervention and control groups

Pulmonary rehabilitation#Controlp-value+
BaselinePost-interventionChangeBaselinePost-observationChange
Endurance time s288 (243–384)492 (270–601)169 (2–303)301 (249–521)300 (188–442)−33 (−129–39)0.001
 %44 (0.7–117)−7 (−25–13)0.005
VO2 mL·kg−1·min−117.2±5.519.5±7.21.7 (0.3–4.7)15.9±4.815.5±4.9−0.6 (−1.4–0.6)0.002
RER isotime1.06±0.121.0±0.11−0.06±0.101.04±0.141.06±0.110.02±0.110.02
Breathing reserve isotime %29±2331±221.2 (−7.0–6.6)40±1438±15−2.3 (−3.6–1.7)0.39
Heart rate beats·min−1144±18142±19−3 (−6–6)144±23141±23−5 (−9–4)0.44
SpO2 isotime %95 (88–97)96 (90–97)0.5 (0–1)95 (87–98)97 (89–98)0 (0–2)0.53
Borg dyspnoea9 (7–10)6.5 (5–9)−2 (−4–0)7 (4.3–9)9 (5–10)1 (0–2.5)0.002
Borg leg discomfort9.5 (5–10)7.5 (5–9)−1 (−3–2)8 (3.5–10)9 (7–10)0 (0–2)0.06
IC isotime L1.94±0.621.92±0.630 (−0.06–0.07)1.84±0.571.83±0.53−0.01 (−0.08–0.05)0.99
  • Data are presented as mean±sd, or median (interquartile range), unless otherwise stated. CWR: constant work rate; VO2: oxygen consumption; RER: respiratory exchange rate; SpO2: arterial oxygen saturation measured by pulse oximetry; IC: inspiratory capacity. #: n=18; : n=19; +: p-value refers to the comparison of the change in the variables between groups.