Table 2. Mortality Rate for the 3 Mortality Risk Categories for the First and Second Spo2 to Fio2 Ratios.
| Mortality | High risk (range, 50-100) | Intermediate risk (range, 101-426) | Low risk (range, 427-476) | |||
|---|---|---|---|---|---|---|
| Survivors | Nonsurvivors | Survivors | Nonsurvivors | Survivors | Nonsurvivors | |
| First Spo2 to Fio2 ratio (basal assessment)a | ||||||
| At 1 d | 11/17 (64.7) | 6/17 (35.2) | 647/734 (88.1) | 87/734 (11.9) | 2816/2854 (98.6) | 38/2854 (1.4) |
| At 2 d | 9/17 (52.9) | 8/17 (47.1) | 627/734 (85.4) | 107/734 (14.6) | 2803/2854 (98.2) | 51/2854 (1,8) |
| At 3 d | 9/17 (52.9) | 8/17 (47.1) | 622/734 (84.7) | 112/734 (15.3) | 2794/2854 (97.8) | 60/2854 (2.2) |
| At 7 d | 8/17 (47.1) | 9/17 (52.9) | 586/734 (79.9) | 148/734 (20.1) | 2756/2854 (96.5) | 98/2854 (3.5) |
| Second Spo2 to Fio2 ratio (after prehospital ventilatory support)a | ||||||
| At 1 d | 196/262 (74.8) | 66/262 (25.2) | 951/1004 (94.7) | 53/1004 (5.3) | 2327/2339 (99.5) | 12/2339 (0.5) |
| At 2 d | 181/262 (69.1) | 81/262 (30.9) | 933/1004 (92.9) | 71/1004 (7.1) | 2325/2339 (99.4) | 14/2339 (0.6) |
| At 3 d | 176/262 (67.1) | 86/262 (32.9) | 928/1004 (92.4) | 76/1004 (7.6) | 2321/2339 (99.2) | 18/2339 (0.8) |
| At 7 d | 151/262 (57.6) | 111/262 (42.4) | 899/1004 (89.5) | 105/1004 (10.5) | 2299/2339 (98.2) | 40/2339 (1.8) |
Abbreviations: Fio2, fraction of inspired oxygen; Spo2, oxygen saturation measured by pulse oximetry.
a
Values expressed as total number (fraction).