NIVS group | Control group | |
Patients n | 14 | 15 |
Age yrs | 70±5 | 71±4 |
Sex female/male | 4/10 | 1/14 |
BMI kg·m−2 | 24.1±2.9 | 24.4±3.5 |
Pulmonary function | ||
FEV1 L | 1.06±0.36 (41±10) | 1.10±0.24 (38±9) |
FVC L | 3.01±0.90 (87±14) | 2.84±0.45 (76±14) |
FEV1/FVC | 0.34±0.06 (45±8) | 0.36±0.08 (49±10) |
RV L | 3.79±0.66 (161±18) | 4.17±1.25 (164±50) |
FRC L | 4.89±0.91 (148±13) | 5.29±1.35 (150±38) |
TLC L | 7.22±1.43 (118±9) | 7.32±1.04 (112±16) |
DL,CO mmol·kPa−1·min−1 | 4.29±1.58 (50±19) | 3.68±1.36 (44±17) |
PI,max cmH2O | 58±20 (62±18) | 59±21 (58±24) |
PE,max cmH2O | 100±44 (58±18) | 111±28 (62±19) |
Data are presented as mean±sd (% predicted), except where otherwise stated. NIVS: noninvasive ventilatory support; BMI: body mass index; FEV1: forced expiratory volume in one second; FVC: forced vital capacity; RV: residual volume; FRC: functional residual capacity; TLC: total lung capacity; DL,CO: transfer factor for carbon monoxide; PI,max: maximal inspiratory pressure; PE,max: maximal expiratory pressure.