1. Association of radiation dose intensity with overall survival in patients with distant metastases
- Author
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Anurag K. Singh, Emily Copel, Amanda Zucker, Boramir Darakchiev, Mark K. Farrugia, Symeon Missios, John Loscalzo, Ashish Sangal, Samantha Frontario, and Johnny Kao
- Subjects
Adult ,Male ,Oncology ,Cancer Research ,medicine.medical_specialty ,medicine.medical_treatment ,survival ,Metastasis ,Young Adult ,Neoplasms ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Neoplasm Metastasis ,Research Articles ,radiotherapy ,RC254-282 ,Radiation oncologist ,Aged ,Aged, 80 and over ,Performance status ,Proportional hazards model ,business.industry ,Clinical Cancer Research ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Cancer ,Radiotherapy Dosage ,Middle Aged ,medicine.disease ,Survival Analysis ,Primary tumor ,metastatic ,Radiation therapy ,Propensity score matching ,Female ,business ,Research Article ,patient selection - Abstract
Background Patients with metastatic cancer referred to radiation oncology have diverse prognoses and there is significant interest in personalizing treatment. We hypothesized that patients selected for higher biologically equivalent doses have improved overall survival. Methods The study population consists of 355 consecutive adult patients with distant metastases treated by a single radiation oncologist from 2014 to 2018. The validated NEAT model was used to prospectively stratify patients into four distinct cohorts. Radiation dose intensity was standardized using the equivalent dose in 2 Gy fractions (EQD2) model with an α/β of 10. Radiation dose intensity on survival was assessed via Cox regression models and propensity score match pairing with Kaplan–Meier analysis. Results The median survival was 9.3 months and the median follow‐up for surviving patients was 18.3 months. The NEAT model cohorts indicated median survivals of 29.5, 11.8, 4.9, and 1.8 months. Patients receiving an EQD2 of ≥40 Gy had a median survival of 16.0 months versus 3.8 months for patients receiving an EQD2 of, Personalized radiotherapy treatment options for patients with metastatic is of significant interest and prompted investigation into higher biological equivalent doses to see if there was increased survival. Higher dose intensity was used for patients with better progresses and was associated with improved survival with metastatic diseases.
- Published
- 2021
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