IGHE and allergic disease: Given regional variations in allergen sensitization patterns, localized epidemiological data are needed to inform clinical management.<h4>Methods</h4>This single-center, hospital-based retrospective study included 19,787 patients with suspected allergic diseases who underwent serum specific IgE (sIgE) testing between January 1, 2019 and December 31, 2021 at the First Hospital Affiliated with Ningbo University in Ningbo, China.