The association of De Ritis ratio with the severity of Crimean–Congo hemorrhagic fever

Aim: This study aimed to present the characteristics and poor prognostic factors of Crimean–Congo hemorrhagic fever (CCHF) patients. Materials & methods: Adult patients (>18 years) with CCHF were included in this retrospective study. Demographics, risk scores and laboratory findings of survivors and nonsurvivors were compared. Results: Fifteen (9.2%) of 163 CCHF patients were nonsurvivors and had a higher Severity Score Index (p < 0.001), Severity Grade Score (p < 0.001) and De Ritis ratio (aspartate transaminase/alanine transaminase) (p < 0.001). De Ritis ratio was >3 in 10.1% of survivors and 53.3% of nonsurvivors (p < 0.001). In multivariate analysis, De Ritis ratio >3 (OR: 5.428, p = 0.045) and SGS (OR: 1.776, p = 0.005) were found as predictive factors. Conclusion: De Ritis ratio may predict prognosis in combination with severity risk scores in CCHF.