Figure 2

(a) Estimated probability of mechanical invasive oro-tracheal intubation/death (OTI/death) according to pLMWH exposure in the study population and stratified by PaO₂/FiO₂ ratio at admission (b) > 300 mmHg and (c) ≤ 300 mmHg. pLMWH prophylactic low molecular weight heparin, OTI/death oro-tracheal intubation/death.