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Screening Adherence in the Veterans Administration Lung Cancer Screening Demonstration Project.

Tanner NT, Brasher PB, Wojciechowski B, Ward R, Slatore C, Gebregziabher M, Silvestri GA. Screening Adherence in the Veterans Administration Lung Cancer Screening Demonstration Project. Chest. 2020 Oct 1; 158(4):1742-1752.

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Abstract:

BACKGROUND: Adherence to annual low-dose CT was 95% in the National Lung Screening Trial and must be replicated to achieve mortality benefit from screening. RESEARCH QUESTION: How do we determine adherence rates within the Veterans Affairs Lung Cancer Screening Demonstration Project and identify factors predictive of adherence? STUDY DESIGN AND METHODS: A secondary data analysis of the Lung Cancer Screening Demonstration Project that was conducted at eight Veterans Affairs medical centers was performed to determine adherence to follow up imaging and to determine factors predictive of adherence. RESULTS: A total of 2,103 patients were screened. The adherence to screening from baseline scan (T0) to first follow-up scan (T1) was 82.2% and 65.2% from T1 to second follow-up scan (T2). Logistic regression modeling showed that presence of a nodule and the site of lung cancer screening were predictive of adherence. After three rounds of screening, 1,343 patients (64%) who underwent baseline screening underwent both subsequent annual low-dose CT scans; 225 patients (11%) had only one subsequent low-dose CT; 0.4% did not have a T1 scan but did have a T2 scan; 70 patients (3%) died, and 36 patients (1.7%) were diagnosed with lung cancer. There was significant variation in screening adherence across the eight sites, which ranged from 63% to 94% at T1 and 52% to 82% at T2 (P  < .05). INTERPRETATION: Despite a centralized program design with dedicated navigator and registry to assist with adherence to annual lung cancer screening, variations between sites suggest that active follow-up strategies are needed to optimize adherence. For the mortality benefit from lung cancer screening to be recognized, adherence to annual screening must achieve higher rates.





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