Table 1 Patient characteristics according to the cutoff value of right diaphragm forced excursion
From: Clinical values of diaphragmatic movement in patients with chronic obstructive pulmonary disease
Total N=60 | < 6.7 cm n=26 | ≥ 6.7 cm n=34 | p-value | |
|---|---|---|---|---|
Age (years) | 69.7 ± 7.2 | 68.5 ± 8.0 | 70.5 ± 6.5 | 0.298 |
Sex (male) | 59 (98.3) | 26 (100) | 33 (97.1) | 0.378 |
Smoking | 0.925 | |||
Never | 26 (43.3) | 12 (46.2) | 14 (41.2) | |
Current | 10 (16.7) | 4 (15.4) | 6 (17.6) | |
Former | 24 (40.0) | 10 (38.5) | 14 (41.2) | |
mMRC | 0.351 | |||
0 | 0 | 0 | 0 | |
1 | 21 (43.3) | 7 (26.9) | 14 (41.2) | |
2 | 31 (51.7) | 14 (53.8) | 17 (50.0) | |
3 | 8 (13.3) | 5 (19.2) | 3 (8.8) | |
SGRQ | 33.1 ± 15.2 | 35.5 ± 15.0 | 31.2 ± 15.3 | 0.286 |
GOLD | 0.085 | |||
1 (mild) | 5 (8.3) | 1 (3.8) | 4 (11.8) | |
2 (moderate) | 31 (51.7) | 12 (46.2) | 19 (55.9) | |
3 (severe) | 20 (33.3) | 9 (34.6) | 11 (32.4) | |
4 (very severe) | 4(6.7) | 4 (15.4) | 0 (0) | |
BMI (kg/m2) | 23.0 ± 3.1 | 22.8 ± 3.0 | 23.1 ± 3.2 | 0.681 |
Percent body fat (%) | 24.2 ± 6.9 | 24.4±7.5 | 25.7±6.5 | 0.463 |
PFT | ||||
FEV1 (%) | 55.1 ± 17.4 | 49.2 ± 16.2 | 59.5±17.2 | 0.021 |
FVC (%) | 81.7 ± 17.7 | 76.2 ± 19.1 | 86.0 ± 15.5 | 0.032 |
FEV1/FVC | 48.2 ± 14.5 | 47.2 ± 15.2 | 49.0 ± 14.1 | 0.629 |
Maximum inspiratory pressure (cmH2O) | 78.4 ± 28.6 | 67.4 ± 25.1 | 86.5 ± 28.7 | 0.010 |
Maximum expiratory pressure (cmH2O) | 83.1 ± 27.5 | 83.2 ± 32.0 | 83.0 ± 24.2 | 0.977 |
Peak expiratory flow rate (L/min) | 245.2 ± 119.7 | 227.7 ± 106.8 | 258.9 ± 129.0 | 0.335 |
6MWT | ||||
Total distance of 6MWT (m) | 461.1 ± 121.3 | 416.8 ± 159.9 | 493.7 ± 68.6 | 0.031 |
SpO2 before 6MWT (%) | 94.8 ± 2.2 | 94.1 ± 2.7 | 95.3 ± 1.6 | 0.038 |
SpO2 after 6MWT (%) | 88.6 ± 5.6 | 88.4 ± 5.7 | 88.8 ± 5.5 | 0.784 |
Interruption of the 6MWT (n) | 4 (15.4) | 0 (0) | 0.018 | |
Diaphragm (cm) | ||||
Right forced excursion* | 7.0 ± 1.2 | 5.3 ± 1.2 | 8.3 ± 1.4 | <0.001 |
Left forced excursion* | 7.3 ± 1.4 | 6.8 ± 1.5 | 7.6 ± 1.3 | 0.022 |
Right thickness, end-expiration | 0.2 ± 0.0 | 0.2 ± 0.0 | 0.2 ± 0.0 | 0.256 |
Right thickness, end-inspiration | 0.3 ±0.1 | 0.3 ± 0.1 | 0.4 ± 0.1 | 0.006 |
Right thickness Fraction (%) | 76.8 ± 31.2 | 66.0 ± 30.4 | 85.1 ± 29.7 | 0.017 |
Left thickness Fraction (%) | 85.9 ± 157.7 | 66.8 ± 27.0 | 100.5 ± 208.3 | 0.417 |