Tables
- TABLE 1
Baseline data and cardiopulmonary response to stair climbing
Controls# Patients¶ p-value Males/females 3/10 5/6 0.25 Age, years 49±8.0 54±9.9 0.19 BMI, kg·m−2 26±5.2 29±3.0 0.047* Nijmegen questionnaire+ 3.5±4.7 23±9.8 <0.01** Dyspnoea-12 questionnaire§ 0.0±0 15.7±8.6 <0.01** FEV1, % predicted 99.4±16 109±10 0.23 FVC, % predicted 101±18 115±12 0.04* Rest measurements VE, L·min−1 11±4.1 12±4.9 0.36 BF, breaths per min 17±3.3 22±5.0 0.01* VʹO2, mL·min−1·kg−1 4.5±1.2 3.8±0.7 0.91 VT, L·min−1 0.69±0.2 0.59±0.1 0.09 HR, beats per min 78±14 78±9.5 0.73 PETCO2, kPa 4.4±0.3 4.0±0.4 <0.01** RER 0.92±0.1 0.88±0.2 0.15 Dyspnoeaƒ 0.0 (0.0) 0.5 (1.0) 0.02* RPEƒ 0.0 (0.0) 1.0 (1.0) 0.02* End-stair climb measurements VE, L·min−1 24±8.6 36±9.0 <0.01** VE, % maximum 22±5.9 31±9.7 0.02* BF, per min 21±4.1 31±11 <0.01** VʹO2, mL·min−1·kg−1 13±2.6 14±3.0 0.57 BF change, breaths per min 4±4.2 10±8.6 0.21 VT, L·min−1 1.3±0.4 1.3±0.4 0.87 HR, beats per min 121±19 116±17 0.65 Dyspnoeaƒ 0.5 (0.5) 4.0 (2.0) 0.00** RPEƒ 1.0 (1.5) 3.0 (4.0) 0.00** Stair-climb time, s 35.6±9.0 48.3±21 0.04* Data are presented as mean±sd or median (interquartile range), unless otherwise stated. BMI: body mass index; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; VE: exhaled volume per breath; BF: breathing frequency; VʹO2: oxygen consumption; VT: tidal volume; HR: heart rate; PETCO2: end-tidal carbon dioxide tension; RER: respiratory exchange ratio; RPE: Rate of Perceived Exertion. #: N=13; ¶: N=11; +: out of 64; §: out of 24; ƒ: Borg Dyspnoea Scale. *: p<0.05; **: p<0.01.