Table 2 Oxygenation parameters
From: Hyperoxaemia and hypoxaemia are associated with harm in patients with ARDS
Parameter | Overall N = 202 | Non-Survivors N = 63 | Survivors N = 139 | p-value |
|---|---|---|---|---|
Highest PaO2 (kPa) {mmHg} | 17.40 [14.8, 21.9] {130.5 [111.0, 164.3]} | 16.5 [14.3, 21.8] {123.8 [107.3, 163.5]} | 18.2 [15.0, 21.8] {136.5 [112.5, 163.5]} | 0.22 |
Highest FiO2 (%) | 0.7 [0.5, 0.8] | 0.7 [0.6, 0.9] | 0.7 [0.5, 0.8] | 0.17 |
Highest P/F ratio (kPa) {mmHg} | 41.0 [32.7, 48.6] {307.5 {245.3, 364.5]} | 38.2 [26.4, 44.6] {286.5 [198.0, 334.5]} | 41.7 [35.1, 49.5] {312.8 [263.3, 371.3]} | 0.004 |
Average time-weighted PaO2 (kPa) {mmHg} | ||||
First 24 h of ARDS | 11.5 [10.4, 13.1] {86.3 [78.0, 98.3]} | 11.4 [10.1, 12.9] {85.5 [75.8, 96.8]} | 11.6 [10.5, 13.1] {87.0 [78.8, 98.3]} | 0.37 |
First 7 days of ARDS | 11.8 [10.7, 12.6] {88.5 [80.3, 94.5]} | 11.3 [10.2, 12.5] {84.8 [76.5, 93.8]} | 11.9 [10.9, 12.6] {89.3 [81.8, 94.5]} | 0.08 |
Number of hyperoxaemia episodes (First 7 days of ARDS) | 3.0 [1.0, 6.0] | 2.0 [0.5, 4.0] | 3.0 [1.0, 6.0] | 0.04 |
Any hyperoxaemia episode–N (%) | 166 (82) | 47 (75) | 119 (86) | 0.09 |
Ever exposed to excess oxygen–N (%) | 111 (55) | 36 (57) | 75 (54) | 0.79 |
Excess oxygen exposure | ||||
First 24 h of ARDS | 0.0 [0.0, 0.2] | 0.0 [0.0, 0.2] | 0.0 [0.0, 0.1] | 0.75 |
First 7 days of ARDS | 0.1 [0.0, 0.2] | 0.1 [0.0, 0.2] | 0.1 [0.0, 0.3] | 0.84 |