Fig. 3From: Effect of heparin treatment on pulmonary embolism and in-hospital death in unvaccinated COVID-19 patients without overt deep vein thrombosisKaplan–Meier curves representing the survival probability of COVID-19 patients according to having (black line) or not (light gray line) pulmonary embolism (PE) diagnosis. Dashed lines represent the 95% confidence interval range correspondent to the respective color. Below curves, there is the frequency table of patients at risk during the follow-up timeBack to article page