Corrigendum to “The effectiveness of blood routine parameters and some biomarkers as a potential diagnostic tool in the diagnosis and prognosis of Covid-19 disease” [Int. Immunopharmacol. 98 (2021) 107838] (International Immunopharmacology (2021) 98, (S1567576921004744), (10.1016/j.intimp.2021.107838))

The authors inadvertently forgot to indicate some application steps regarding the CHAID analysis method applied in the statistical analysis (Section 2.8) section of the original article. Also, in Tables 4 and 6, there were misspelled numbers in the OR (odds-ratio) and confidence intervals of some variables. These corrections do not affect the interpretation of the data or the conclusions drawn. The authors apologize to the journal and readers for these unintentional errors. The significance levels for the significant p values (p = 0.000,) given in all tables were accepted as *p < 0.05, **p < 0.01, ***p < 0.001. These importance levels are specified in the table explanations in the original article. We felt the need to reiterate. The following statistical model specifications and stopping criteria were applied in the CHAID decision tree analysis: (1) Significant level for separation nodes was determined as p < 0.05.(2) The Bonferroni method was used to obtain significant correction values.(3) The minimum change in expected cell frequencies was 0.001.(4) Pearson χ2 independence test was used to determine the relationships between independent (explanatory) variables.(5) Model depth is set to maximum.(6) A 10-fold cross-validation was used to evaluate the tree structure and(7) Misclassification risk was calculated as a measure of model reliability. Table 4.[Table presented] Table 6.[Table presented] © 2023 Elsevier B.V.