Table 2. Patient characteristics in the 24 hours following inclusion.
| Characteristics | SSD group (n=55) | Control group (n=45) | P† |
|---|---|---|---|
| Enteral nutrition volume (mL), mean ± SD | 613±453 | 365±462 | 0.003‡ |
| Gastric residual volume (mL), mean ± SD | 57±164 | 105±179 | 0.027‡ |
| Prokinetic drugs, n [%] | 2 [4] | 1 [2] | >0.999 |
| Proton pump inhibitors, n [%] | 30 [55] | 23 [51] | 0.841 |
| Sucralfate, n [%] | 20 [36] | 18 [40] | 0.836 |
| Vomiting, n [%] | 1 [2] | 4 [9] | 0.171 |
| Mean cuff pressure (cmH2O), median (IQR) | 23 (21.0–30.0) | 29 (22.5–30) | 0.015‡ |
| Cuff pressure <20 cmH2O, n [%] | 20 [36] | 11 [24] | 0.277 |
| Sedation, n [%] | 27 [49] | 25 [56] | 0.522 |
| Neuromuscular blocking agents, n [%] | 2 [4] | 8 [18] | 0.040 |
| Mean bed head elevation, median (IQR) | 35 (30.0–40.0) | 32.5 (30–39.5) | 0.239‡ |
| Out-of-ICU transport, n [%] | 2 [4] | 1 [2] | >0.999 |
| Prone positioning, n [%] | 0 [0] | 3 [7] | 0.088 |
| Ventilation modes§, n [%] | |||
| Assist-control | 24 [44] | 27 [60] | 0.113 |
| Pressure support | 40 [73] | 26 [58] | 0.140 |
| Biphasic positive airway pressure | 0 [0] | 1 [2] | 0.450 |
| Mean positive end-expiratory pressure (cmH2O), median (IQR) | 6 (5.0–8.0) | 8 (5.0–10.0) | 0.116‡ |
†, P value calculated using Fisher’s exact test unless specified otherwise; ‡, P value calculated using Mann-Whitney U test; §, each patient could receive multiple ventilation modes. SSD, subglottic secretion drainage; SD, standard deviation; IQR, interquartile range; ICU, intensive care unit.