Continuous Positive Airway Pressure in Elderly Patients with Severe COVID-19 Related Respiratory Failure.

The illness-death model analysis ( Figure 2 ) indicated that the HR to develop delirium was about two times higher in patients with P/F ratio < 100 than in those with P/F ratio ≥ 100 ( p = 0.01), while frailty and respiratory rate HR on delirium occurrence risk did not reach statistical significance (frailty HR 1.31, p = 0.31; RR HR 1.49, p = 0.12).

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