Table 3 Comparison of patients with opened vs. unopened loop in mild to moderate COPD
From: Non-linear parameters of specific resistance loops to characterise obstructive airways diseases
Non-openers | Openers | p value | |
|---|---|---|---|
Subjects, n | 22 | 17 | |
BMI, kg/m2 | 24.9 (22.0–29.4) | 26.8 (24.1–27.8) | 0.6093 |
FEV1, %predicted | 83 (76–93) | 65 (61–76) | 0.0018 |
DLCO, %predicted | 67 (55–79) | 69 (53–75) | 0.6774 |
RV, %predicted | 115 (106–133) | 134 (120–150) | 0.0368 |
TLC, %predicted | 109 (99–115) | 107 (102–110) | 0.6793 |
FRC, %predicted | 122 (101–135) | 131 (120–142) | 0.1578 |
RV/TLC, % | 38.7 (35.7–40.4) | 46.6 (41.5–53.9) | 0.0007 |
sGAW, 1/ kPa*sec | 1.03 (0.90–1.21) | 0.61 (0.46–0.74) | <0.0001 |
sG0.5 , 1/ kPa*sec | 1.23 (1.06–1.38) | 1.00 (0.81–1.15) | 0.0047 |
Roundness | 0.09 (0.06–0.12) | 0.31 (0.22–0.41) | <0.0001 |
Area of Loop | 0.14 (0.10–0.20) | 0.31 (0.23–0.44) | <0.0001 |
Asynchrony, msec | 10 (0–40) | 40 (30–70) | 0.0097 |
Point X, ml | −38 (−93–−19) | −92 (−209–−31) | 0.0827 |
Point Y, ml/sec | −251 (−379–−177) | −251 (−406–−139) | 0.7107 |
b 0 | 4.10 (2.92–5.56) | 1.63 (1.18–2.58) | 0.0013 |
b 1 | −3.47 (−8.11–1.16) | −2.40 (−3.95–0.20) | 0.3080 |
b 2 | 1.42 (−2.87–3.27) | 0.77 (−0.46–1.97) | 0.5132 |
SSG, 1/sec | 4.03 (2.76–4.54) | 1.67 (1.50–2.21) | <0.0001 |
Pole1 | 0.84 (0.67–0.96) | 0.93 (0.82–0.97) | 0.2301 |
Pole2 | 0.64 (0.26–0.89) | 0.86 (0.49–0.95) | 0.1216 |