Awake prone positioning effect on SpO2/FiO2, by patient and by episode
| Variable | N | Before proning | After proning | P value |
| S/F ratio by all episodes—median (IQR), mean (SD) | 42 | 153 (131–188), 159 (43) | 158 (150–233), 177 (45) | 0.08 |
| S/F ratio by patient—median (IQR), mean (SD) | 10 | 157 (150–187), 164 (34) | 193 (155–234), 192 (46) | 0.14 |
| S/F ratio by episode: | ||||
| Episode 1—median (IQR), mean (SD) | 10 | 153 (135–185), 161 (33) | 192 (156–234), 197 (50) | 0.04 |
| Episode 2—median (IQR), mean (SD) | 7 | 152 (131–173), 155 (44) | 158 (153–176), 170 (33) | 0.44 |
| Episode 3—median (IQR), mean (SD) | 5 | 153 (152–155), 147 (37) | 150 (148–157), 150 (31) | 0.92 |
| Episode 4—median (IQR), mean (SD) | 5 | 153 (127–157), 144 (36) | 150 (134–160), 162 (46) | 0.75 |
| Episode 5—median (IQR), mean (SD) | 5 | 152 (139–153), 156 (56) | 163 (157–165), 165 (47) | 0.35 |
| Episode 6—median (IQR), mean (SD) | 4 | 195 (143–236), 184 (64) | 196 (149–233), 186 (57) | 0.78 |
| Episode 7—median (IQR), mean (SD) | 3 | 157 (137–197), 171 (62) | 157 (140–197), 173 (59) | 0.82 |
| Episode 8—median (IQR), mean (SD) | 3 | 230 (180–235), 174 (58) | 233 (187–234), 203 (53) | 0.83 |