This analysis revealed that female gender (OR 12.400; 95% CI 1.485 to 103.520; p=0.020), receiving doses of a combination of different vaccines rather than the same type (OR 5.775; 95% CI 1.991 to 16.748; p=0.001), high levels of antibodies against the SARS-CoV-2 N protein (OR 2.821; 95% CI 1.047 to 7.599; p=0.040), and the development of asthma and/or allergic rhinitis (OR 10.909; 95% CI 1.270 to 93.692; p=0.029) were positively correlated with the occurrence of LC. Here, PROS1 is linked to laryngotracheoesophageal cleft.