Early-Stage Lung Cancer in the Era of Lung Cancer Screening: Veterans Health Administration Outperforms Other Insurance Models.

Background: Lung cancer screening guidelines were introduced in the United States in 2013, with variable implementation. This study evaluated temporal diagnostic trends in non-small cell lung cancer (NSCLC) diagnosis since the introduction of these guidelines.

Methods: This retrospective cohort analysis used data from the Veterans Administration Corporate Data Warehouse and the National Cancer Database. We evaluated temporal trends in the distribution of NSCLC stage at the time of diagnosis along with differences based on insurance coverage type, including uninsured, privately insured, Medicare, Medicaid, and Veterans Affairs (VA) coverage, with adjustment for clinically relevant variables.

Results: Among 1,450,965 patients diagnosed from 2006 to 2020, the proportion of NSCLC cases diagnosed at stage I increased in all insurance groups by 12.74%, 2%, 0.25%, and 2.57% for the VA, Medicare, private insurance, and Medicaid, respectively. If all insurance systems achieved the unadjusted stage distribution seen in the Veterans Health Administration, an additional 45,684 patients would be diagnosed with stage I NSCLC and 65,933 fewer patients would be diagnosed with stage IV disease.

Conclusions: For patients with any form of insurance, there has been an increase in the proportion of early-stage NSCLC (stage I and II) and a corresponding decrease in the proportion of stage III and IV since the introduction of national lung cancer screening guidelines. As the largest integrated single-payer health care system in the United States, the VA dramatically outperforms other insurance types, perhaps attributable to universal coverage and robust lung cancer screening programs.