… Youden index for the qCSI at a cutoff of ≥1, with a specificity of 76%. A qCSI of 3 (or a score
≥10 on the 12-point scale) had a specificity of 99% in predicting respiratory failure with a …

Objective This study aimed to determine the predictability of platelet mass index (PMI) for
short-term mortality in patients with COVID 19. Material and methods This retrospective, …

… Risk factors for COVID-19 mortality were … Youden's index was used to determine the cut-off
value for death prediction risk. The score was internally validated using another COVID-19 …

… For each variable, we obtained the optimal dividing cut-off by Youden’s index, carrying out
a receiver operating characteristic (ROC) curve analysis with respect to association with death…

… be determined by calculating Youden’s index. The cut-off point that achieves this maximum
Youden’s index is referred to as the optimal cut-point. Youden Index is the main summary …

… All the Covid-19 patients presenting to the hospital were … We chose the best NLR cut-off
value based on the Youden index and … people over 50 years of age with COVID-19. Key words: …

… The optimal cutoff value for predicting COVID-19 mortality equals the score with the
largest Youden's index for each rapid scoring system. Based on the optimal cutoff value, we …

… In the group of patients with COVID-19 symptoms, according to the best Youden's index,
the … In the same group, according to the best Youden's index, the cut-off value for the Rapid …

… In the ROC analysis for mortality prediction, the area under the curve (AUC) was 0.581 [95%
confidence interval (CI): 0.493-0.666) and the Youden index was 0.23 for SI. In the same …

… According to the best Youden's index, the cutoff value for CRP … According to the best Youden's
index, the cut-off value for … day mortality in patients with COVID-19. The calculation of CAR …