Figure 4 | Scientific Reports

Figure 4

From: High-flow nasal cannula therapy as apneic oxygenation during endotracheal intubation in critically ill patients in the intensive care unit: a systematic review and meta-analysis

Figure 4

Meta-regression plot of PaO2/FiO2 ratio: Meta-regression analysis showing a linear relationship between the reduction in the incidence risk ratio of severe hypoxemia and the increase in PaO2/FiO2 ratio. As the cut-off PaO2/FiO2 ratio reached approximately 250, the upper 95% CI of severe hypoxemia incidence risk ratio equaled to 1 and then the incidence of severe hypoxemia decreased. Circles indicate incidence risk ratios of severe hypoxemia in individual studies, and bubble size is proportional to the precision of individual studies.

Back to article page