Table 4.
Respiratory function at baseline and post a single session of lung volume recruitment
| Variable | N | Baseline | Post-LVR | Observed mean difference (95% CI) | P value |
| Crs (L/cmH2O) | 65 | 0.0377±0.0258 | 0.0415±0.0270 | 0.0038 (0.0001 to 0.0075) | 0.047 |
| LIC (L) | 78 | 1.99±1.02 | 2.12±1.07 | 0.13 (0.05 to 0.21) | 0.002 |
| VC (L) | 78 | 1.57±0.86 | 1.54±0.84 | −0.03 (−0.07 to 0.01) | 0.142 |
| LIC–VC (L) | 78 | 0.42±0.50 | 0.57±0.43 | 9.4 (2.9 to 15.8) | 0.0003 |
| LIC–VC (%VC) | 78 | 36.5±45.9 | 45.9±43.8 | 0.16 (0.07 to 0.24) | 0.005 |
| FRC (L) | 49 | 1.39±0.98 | 1.36±0.97 | −0.03 (−0.09 to 0.03) | 0.348 |
| TLC (L) | 49 | 2.64±1.45 | 2.60±1.41 | −0.03 (−0.10 to 0.03) | 0.266 |
| RV (L) | 49 | 1.00±0.73 | 0.99±0.71 | −0.02 (−0.07 to 0.04) | 0.610 |
| ERV (L) | 49 | 0.38±0.32 | 0.37±0.34 | −0.01 (−0.05 to 0.02) | 0.435 |
| IC (L) | 49 | 1.24±0.70 | 1.25±0.67 | 0.00 (−0.04 to 0.04) | 0.890 |
| PCF (L/min) | 78 | 175.5±69.1 | 169.9±57.6 | −5.6 (−15.0 to 3.9) | 0.244 |
| PCFLIC (L/min) | 77 | 174.8±56.7 | 186.4±57.9 | 11.6 (3.7 to 19.5) | 0.005 |
| PCFLIC – PCF | 77 | −1.5±51.9 | 15.7±39.5 | 17.2 (4.2 to 30.2) | 0.010 |
Total number of participants who completed assessments at both time points=78. Data are presented as mean±SD and mean difference (95% CIs). (n)=the number of participants with technically acceptable measurements at both time points. Results were not obtainable in all due to bulbar impairment, technical issues or fatigue. P value represents paired t-test comparison; data in bold indicate statistically significant values (p<0.05).
Crs, respiratory system compliance; ERV, expiratory reserve volume; FRC, functional residual capacity; IC, inspiratory capacity; LIC, lung insufflation capacity; LVR, lung volume recruitment; PCF, peak cough flow; PCFLIC, PCF from LIC; RV, residual volume; TLC, total lung capacity; VC, vital capacity.