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Mainstreaming in Parallel with Ovarian Cancer Tumor Testing to Improve Genetic Testing Uptake

GYNECOLOGIC ONCOLOGY(2024)

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Abstract
ObjectivesAlthough genetic testing (GT) is universally recommended for patients with epithelial ovarian cancer (EOC), rates are low (34%). In 1/2019, we implemented mainstreaming—GT in parallel with tumor testing via MSK-IMPACT within oncology clinics. We sought to determine GT rates pre/post-mainstreaming and patient characteristics associated with GT.MethodsPatients with newly diagnosed EOC seen at our institution from 7/1/2015–3/31/2022 were included. Clinical data were abstracted including social determinants of health (SDOH) variables, race/ethnicity, marital status, insurance, language, comorbidities, employment, and Yost index, a measure of socioeconomic status. GT rates were calculated overall and pre−/post-mainstreaming (1/2019). Logistic regression models were fit to identify variables associated with GT.ResultsOf 1742 patients with EOC, 1591 (91%) underwent GT. Rates of GT increased from 87% to 95% after mainstreaming (p < 0.001). Among 151 patients not undergoing GT, major reasons were lack of provider recommendation (n = 76, 50%) and logistical issues (n = 38, 25%) with few declining (n = 14, 9%) or having medical complications preventing GT (n = 7, 4.6%). High-grade serous histology, advanced stage (III/IV), and having a spouse/partner were associated with increased GT uptake (p < 0.01). Among SDOH variables, there were no differences by insurance, Yost score, language, comorbidities, employment, or race/ethnicity. In multivariable models, likelihood of GT increased with mainstreaming, even after adjustment for histology, stage, and marital status (OR 3.77; 95% CI: 2.56–5.66).ConclusionsMainstreaming increased the likelihood of GT in patients with EOC. We found lower testing rates in patients without partners/spouses, non–high-grade serous histology, and early-stage disease, representing potential areas for future interventions.
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Key words
Genetic testing,Ovarian cancer,Mainstreaming,Health disparities,Social determinants of health
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