Fig. 3: Comparison of the number of patients needed, including 95% confidence interval, for the different outcome measures, using treatment effects between 0.85 and 0.70.
From: Evaluation of pragmatic oxygenation measurement as a proxy for Covid-19 severity
The bottom line shows predicted sample size required when using a protocolised \(S/{F}_{94}\) measurement, rather than an opportunistic measurement.
