Table 1.
The demographic characteristics of the study participants (N = 52)
| Variables | Values |
|---|---|
| Gender males, N (%) | 33 (63.46%) |
| ARDS source pulmonary, N (%) | 29 (55.8%) |
| ARDS source extrapulmonary, N (%) | 23 (44.2%) |
| Total PPV session once only, N (%) | 29 (55.8%) |
| Total PPV sessions two times, N (%) | 17 (32.7%) |
| Total PPV sessions three times, N (%) | 6 (11.5%) |
| Hours of PPV [median (IQR)] | 18 (16–32) |
| Survival, N (%) | 22 (42.3%) |
| Age (years), Mean ± SD | 45.23 ± 13.08 |
| APACHE II score, Mean ± SD | 15.81 ± 5.16 |
| SOFA score, Mean ± SD | 8.92 ± 3.92 |
| LIS, Mean ± SD | 2.93 ± 0.57 |
| DP pre-PPV (cmH2O), Mean ± SD | 18.13 ± 3.27 |
| DP during PPV (cmH2O), Mean ± SD | 17.37 ± 3.68 |
| DP post-PPV (cmH2O), Mean ± SD | 17.25 ± 3.95 |
| PaO2/FiO2 pre-PPV, Median (IQR) | 89.50 (68–108.25) |
| PaO2/FiO2 during PPV, Median (IQR) | 137 (112.30–187.25) |
| PaO2/FiO2 post-PPV, Median (IQR) | 125 (98–216.25) |
| MV days, Median (IQR) | 8.50 (5–13.75) |
| LOS ICU (days), Median (IQR) | 9 (6–14.75) |
| LOS hospital (days), Median (IQR) | 13.50 (6.25–20.75) |
APACHE II score, acute physiology and chronic health evaluation II score; ARDS, acute respiratory distress syndrome; DP, driving pressure; ICU, intensive care unit; IQR, interquartile range; LOS, length of stay; LIS, Murray lung injury score; MV, mechanical ventilation; PaO2/FiO2 ratio, ratio of partial pressure of arterial oxygen to fraction of inspired oxygen; PPV, prone position ventilation; SD, standard deviation; SOFA, sequential organ failure assessment