Table 4.
Adjusted associations of prone vs supine positioning with physiological parameters by linear mixed effects models.
| Oxygenation index | Oxygenation saturation index | PaO2:FiO2 | SpO2:FiO2 | |
|---|---|---|---|---|
| Number (maneuvers) | N = 59 (85) | N = 60 () | N = 59 () | N = 54 (76) |
| Coefficient (95% CI) | Coefficient (95% CI) | Coefficient (95% CI) | Coefficient (95% CI) | |
| Prone, overall | 0.07 (−0.01, 0.2) | 0.04 (−0.01, 0.08) | 0.10 (0.04, 0.17) | −0.28 (−0.63, 0.08) |
| % improvement | 8% | 4% | 11% | 24% |
| Prone days 1–3 | 0.1 (−0.1, 0.1) | 0.08 (0.0, 0.1)** | 0.05 (−0.0, 0.1) | −0.32 (−0.7, 0.01) |
| % improvement | 1% | 8% | 5% | 27% |
| Prone days 4–7 | 0.30 (0.1, 0.5)** | −0.10 (−0.2, 0.0) | 0.31 (0.2, 0.5)*** | −0.03 (−1.0, 0.9) |
| % improvement | 38% | (9% worsening) | 36%*** | 3% |
| Days 4–7 vs 1–3 | −0.08 (−0.2, 0.1) | 0.09 (−0.0, 0.2) | −0.8 (−0.2, 0.1) | 0.06 (−0.7, 0.8) |
Adjusted for age, sex, race, BMI, Apache II score, and vasopressor use
*
P< 0.05,
**
P< 0.01
***
P< 0.001