Figure 6.

Reciever operating characteristic (ROC) curve analysis evaluating the diagnostic value of LUS‐score and ROX index for prediction of IMV treatment. ROC curves presented for IMV‐ and non‐IMV‐groups and for all patients (IMV, non‐IMV and reference group). See Figure 1 legend for definition of groups. (A) LUS‐score and (B) ROX index as diagnostic tests for determination of requirement of IMV treatment. The table presents suggested cut‐off values (based on Youden index) together with area under the curve (95% CI) and sensitivity and specificity. LUS = Lung ultrasound; ROX index = Respiratory rate and oxygenation index; IMV = invasive mechanical ventilation.