| |
89% SpO2
|
88% SpO2
|
87% SpO2
|
86% SpO2
|
85% SpO2
|
p
|
|---|
|
n
|
279
|
251
|
331
|
389
|
444
| |
|
Risk < 50 (%)
|
46% (40–50%)
|
49% (40–55%)
|
50% (45–56%)
|
74% (70–78%)
|
71% (66–75%)
|
< 0.001
|
|
Risk < 41 (%)
|
13% (9–17%)
|
10% (06–14%)
|
11% (8–15%)
|
20% (16–24%)
|
25% (21–29%)
|
< 0.001
|
|
PaO2 (mmHg)
|
51 (44–57)
|
50 (44–54)
|
49 (44–55)
|
46 (42–50)
|
46 (40–50)
|
< 0.001
|
- Severe hypoxemia defined as PaO2 of < 41 mmHg. Risks shown as a percentage (95% CI of proportion), differences evaluated with chi-square test. PaO2 among all levels presented as median (IQR), with differences in evaluated with Kruskal-Wallis test
