Conversely, high prothrombin levels (OR 1.090; 95% CI 1.023 to 1.161; p=0.008) and CRP levels (OR 1.760; 95% CI 1.100 to 2.814; p=0.018) were correlated with the occurrence of LC. Here, F2 is linked to laryngotracheoesophageal cleft.