Table 2.
Comparisons between PImax and PIpeak obtained at FRC and RV within individuals with different health conditions.
| Health condition | PImax RV |
PImax FRC |
PImax RV PImax FRC Mean diff. [95%CI] |
PImaxFRC (%PImaxRV) |
PIpeak RV |
PIpeak FRC |
PIpeak RV PIpeak FRC Mean diff. [95%CI] |
PIpeakFRC (%PIpeakRV) |
|---|---|---|---|---|---|---|---|---|
| COVID-19 | 79.3 (24.9) | 68.0 (24.0) | 11.3 [5.8, 16.8] | 87.8 (11.3) | 86.3 (26.5) | 75.8 (26.4) | 10.6 [5.1, 16.0] | 88.8 (13.6) |
| COPD | 71.7 (27.7) | 63.3 (26.7) | 8.4 [2.3, 14.5] | 81.6 (15.6) | 78.4 (29.5) | 71.2 (29.3) | 7.2 [1.1, 13.3] | 84.7 (16.6) |
| IPF | 85.7 (24.5) | 74.5 (23.5) | 11.1 [5.5, 16.7] | 86.0 (24.2) | 95.7 (26.1) | 83.3 (25.9) | 12.4 [6.9, 18.0] | 85.1 (18.4) |
| CHF | 77.2 (25.6) | 64.4 (24.6) | 12.8 [7.1, 18.4] | 86.7 (7.3) | 87.7 (27.2) | 73.4 (27.1) | 14.4 [8.6, 20.0] | 86.9 (9.6) |
| Stroke | 65.6 (24.5) | 57.6 (23.5) | 8.0 [2.6, 13.4] | 87.9 (12.0) | 73.6 (26.1) | 63.7 (25.9) | 9.9 [4.5, 15.3] | 86.8 (12.1) |
Data shown as mean (SD). COVID-19, Coronavirus disease 2019; COPD, Chronic obstructive pulmonary disease; IPF, Idiopathic pulmonary fibrosis; CHF: Chronic heart failure. PImax, maximal inspiratory pressure; RV, residual volume; FRC, functional residual capacity; Mean diff., mean difference; 95% CI, 95% confidence interval in brackets; PIpeak, peak inspiratory pressure; PImaxFRC (% PImaxRV), PImax obtained at FRC as% of PImax obtained at RV; PIpeakFRC (% PIpeakRV), PIpeak obtained at FRC as% of PIpeak obtained at RV. Pressures reported as cmH2O.