Figure 1.

(a,b) Median and IQR for S/F ratio and respiratory rate among proned patients (PP) with COVID-19 respiratory failure. The values refer to PRE (1–2 hours before pronation), DURING, and POST (1–4 hours) after supination. (c,d) Changes in oxygenation and respiratory rate in proned patients who were able to tolerate PP for ≤1 hour and those able to tolerate >1 hour (mean ± SD). *denotes statistical significance (p < 0.0001 one-way ANOVA repeated measures for changes seen during proning and post supination compared to pre values).