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Epidemiology, longitudinal treatment patterns and outcomes of chronic lymphocytic leukemia in Israel

Clara Weil, Gabriel Chodick, Varda Shalev, Inna Kan, Ran Afik, Raanan Cohen, Kavita Sail , Yair Herishanu


Abstract

This study aims to describe chronic lymphocytic leukemia (CLL) epidemiology, treatment patterns and outcomes in a 2.3-million-member healthcare provider database (Maccabi Healthcare Services, Israel). Newly-diagnosed CLL patients (1999-2017) were followed through 31/3/2018. A total of 1857 newly-diagnosed CLL patients were included. Annual incidence was 5.82 per 100,000 population. Median overall survival (OS) was 12.7 (95%CI: 11.8-13.5) years since diagnosis. Approximately 1/3 initiated treatment within 5 y. A statistical trend (p = 0.066) for improved OS over time was observed among younger patients (age <70 y) treated in 2009-2017 vs. 1999-2008). Among patients treated since 2009 (n = 411; median age = 68y), fludarabine-cyclophosphamide-rituximab (FCR), bendamustine-rituximab and obinutuzumab ± chlorambucil accounted for 19.5%, 12.2% and 11.4% of first line, respectively. Median (95%CI) time to next treatment and OS were 3.1(2.6-3.6) and 7.0(6.3-7.7) years, respectively. CLL incidence in Israel is comparable to developed countries. Real-world data suggest a trend of improved survival over the last decade among patients treated before age 70.


Keywords: Chronic lymphocytic leukemia; chemotherapy; immunotherapy; incidence; survival; time to next treatment.


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