TABLE 2

Results of spirometry, oscillometry, and high-resolution computed tomography scores

ParameterValueRange
Subjects n80
Spirometry
 FEV1 L2.05±0.620.76–3.33
 FEV1 % pred88.9±16.854.1–142.3
 FEV1/FVC %85.0±7.371.3–100.0
 VC L2.45±0.830.79–4.15
 FVC L2.46±0.830.76–4.14
 FVC % pred83.3±18.041.5–127.1
 IC L1.60±0.600.47–3.12
 IRV L0.74±0.420.08–2.40
 ERV L0.85±0.370.19–2.00
VT L0.86±0.360.28–1.82
Oscillometry
R5 cmH2O·L−1·s−13.14±1.041.21–5.96
R5 % pred153.7±56.539.0–388.1
R20 cmH2O·L−1·s−12.39±0.771.10–4.32
R20 % pred92.6±29.432.9–196.8
R5R20 cmH2O·L−1·s−10.75±0.370.05–1.99
X5 cmH2O·L−1·s−1−1.24±0.76−3.04–0.00
X5 % predicted94.5±56.20.0–246.4
 Fres Hz12.11±3.344.30–20.89
 Fres % pred102.4±30.336.0–184.2
 ALX cmH2O·L−1·s−1×Hz6.99±5.690.04–24.66
 ALX % pred232.8±197.31.1–857.9
HRCT scores
 Airspace consolidation1.9±2.70.0–11.7
 Honeycombing10.8±11.90.0–55.8
 Architectural distortion1.4±1.70–6
 Traction bronchiectasis6.7±4.40–18
 Interstitial fibrosis18.8±4.87–24

Data are presented as mean±sd and range, unless otherwise stated. ALX: low-frequency reactance area; ERV: expiratory reserve volume; FEV1: forced expiratory volume in 1 s; Fres: resonant frequency; FVC: forced vital capacity; HRCT: high-resolution computed tomography; IC: inspiratory capacity; IRV: inspiratory reserve volume; % pred: % predicted; R5 and R20: respiratory system resistance at 5 and 20 Hz, respectively; VT: tidal volume; VC: vital capacity; X5: respiratory system reactance at 5 Hz.