Fig. 4From: The relevance of chest X-ray radiologic severity index and CURB-65 score with the death event in hospitalized patient with COVID-19 pneumoniaReceiver operating characteristic curve of RSI1 and RSI2. ROC curve showing the RS1 value curve (blue colour) and the RSI2 value curve (green colour) which are above the reference line. The curve of the RSI1 and RSI2 values has a fairly wide area under the curve and has good sensitivity as a measuring tool. From the figure, it can be seen that the area under the RSI2 curve is wider than the RSI1 curveBack to article page