Fig. 3From: Evaluation of vitamin A and E deficiency with severity of SARS-COV-2 disease: a case–control studyReceiver operating characteristic (ROC) curve for prediction of Severity of COVID-19 using Vitamin A level. ROC curve construction revealed that a cutoff point < 0.65 µg/ml of vitamin A can predict COVID-19 disease severity and development of ARDS with sensitivity 90% and specificity 83.3%Back to article page