Disparities In Next Generation Sequencing In A Population-Based Community Cohort Of Patients With Advanced Non-Small Cell Lung Cancer.

6563Background: The use of next generation sequencing (NGS) in patients with advanced non-small cell lung cancer (NSCLC) is increasing. This study explored disparities in the use of NGS testing. Methods: This retrospective observational study utilized Flatiron Health’s longitudinal, demographically and geographically diverse database containing electronic health record data from 191 oncology practices across the U.S. We identified patients diagnosed with advanced (stages IIIB/IV or recurrent) non-squamous NSCLC who received first line treatment and either NGS testing or standard biomarker testing (e.g., EGFR, ALK) alone. NGS included any multi-gene panel testing u003e 30 genes. Logistic regression modeled the association between patient characteristics and receipt of NGS testing, accounting for clustering of patients by oncology practice. Results: Among 5,688 adults with advanced NSCLC, 4,813 (84.6%) patients received standard biomarker testing alone and 875 (15.4%) patients received NGS testing. The median a...