Socioeconomic Disparities in Treatment Access and Survival in Sinonasal Adenoid Cystic Carcinoma: a Population-Based Analysis

Background: Sociodemographic factors including socioeconomic status (SES) and residence type may influence access to care and survival in patients with sinonasal adenoid cystic carcinoma (ACC), but data are limited. This retrospective study examines how SES and rural or urban zip code impact treatment and survival in ACC patients in the United States using the Surveillance, Epidemiology, and End Results (SEER) program database. Methods: A total of 872 patients with adenoid cystic carcinoma of the sinonasal cavity between 2000 and 2022 were retrospectively evaluated using the SEER program database. International Classification of Diseases for Oncology (ICD-O) codes for subsite and histology were used to identify patients which included C30.0 (Nasal cavity) C31.0 (Maxillary Sinus), C31.1 (Ethmoid Sinus) C31.2 (Frontal sinus) C31.3 (Sphenoid sinus) C31.8 (Overlapping lesion of accessory sinuses), C31.9 (Accessory sinus, NOS), C11 (Nasopharynx) and ICD-O histology code 8200/3 (Adenoid Cystic Carcinoma). County-level median household income was grouped into quartiles (Q1–Q4: Q1