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Hypofractionated vs. conventional radiation therapy for stage III non-small cell lung cancer treated without chemotherapy. 2020

Michelle Iocolano, and Aaron T Wild, and Margaret Hannum, and Zhigang Zhang, and Charles B Simone, and Daphna Gelblum, and Abraham J Wu, and Andreas Rimner, and Annemarie F Shepherd
Stony Brook University School of Medicine, Stony Brook, NY, USA.

Background: Patients with unresectable locally advanced NSCLC who refuse or are not candidates for chemotherapy often receive radiation therapy (RT) alone. Hypofractionated RT (HFRT) regimens are becoming increasingly common. An analysis of the National Cancer Database (NCDB) was performed to evaluate the practice patterns and outcomes of HFRT vs. conventionally fractionated RT (CFRT) in patients with stage III NSCLC undergoing definitive RT alone.Material and methods: The NCDB was queried for all patients with stage III NSCLC diagnosed between 2004 and 2014 who received RT alone. CFRT was defined as patients treated to a total dose of 60-80 Gy in 1.8-2 Gy daily fractions. HFRT was defined as patients treated to a total dose of 50-80 Gy in 2.25-4 Gy fractions. Logistic regression, univariable and multivariable analyses (MVAs) for overall survival (OS) and propensity score matched analyses (PSMAs) were performed.Results: A total of 6490 patients were evaluated: 5378 received CFRT and 1112 received HFRT. Median CFRT dose was 66 Gy in 2 Gy fractions vs. 58.5 Gy in 2.5 Gy fractions for HFRT. HFRT was associated with older age, lower biological effective dose (BED10), academic facility type, higher T-stage and lower N-stage. On initial analysis, HFRT was associated with inferior OS (median 9.9 vs. 11.1 months, p<.001), but after adjusting for the imbalance in covariates such as age, BED10, T-stage and N-stage using PSMA, the difference in survival was no longer significant (p=.1).Conclusions: In the appropriate clinical context, HFRT can be an option for patients with locally advanced NSCLC who are not candidates for chemotherapy or surgical resection. HFRT needs to be further studied in prospective trials to evaluate toxicity and tumor control.

UI MeSH Term Description Entries
D008175 Lung Neoplasms Tumors or cancer of the LUNG. Cancer of Lung,Lung Cancer,Pulmonary Cancer,Pulmonary Neoplasms,Cancer of the Lung,Neoplasms, Lung,Neoplasms, Pulmonary,Cancer, Lung,Cancer, Pulmonary,Cancers, Lung,Cancers, Pulmonary,Lung Cancers,Lung Neoplasm,Neoplasm, Lung,Neoplasm, Pulmonary,Pulmonary Cancers,Pulmonary Neoplasm
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009367 Neoplasm Staging Methods which attempt to express in replicable terms the extent of the neoplasm in the patient. Cancer Staging,Staging, Neoplasm,Tumor Staging,TNM Classification,TNM Staging,TNM Staging System,Classification, TNM,Classifications, TNM,Staging System, TNM,Staging Systems, TNM,Staging, Cancer,Staging, TNM,Staging, Tumor,System, TNM Staging,Systems, TNM Staging,TNM Classifications,TNM Staging Systems
D010818 Practice Patterns, Physicians' Patterns of practice related to diagnosis and treatment as especially influenced by cost of the service requested and provided. Clinical Practice Patterns,Physician's Practice Patterns,Clinical Practice Pattern,Pattern, Clinical Practice,Patterns, Clinical Practice,Practice Pattern, Clinical,Practice Patterns, Clinical,Practice Patterns, Physician's,Prescribing Patterns, Physician,Physician Practice Patterns,Physician Prescribing Pattern,Physician Prescribing Patterns,Physician's Practice Pattern,Physicians' Practice Pattern,Physicians' Practice Patterns,Practice Pattern, Physician's,Practice Pattern, Physicians',Practice Patterns, Physician,Prescribing Pattern, Physician
D011879 Radiotherapy Dosage The total amount of radiation absorbed by tissues as a result of radiotherapy. Dosage, Radiotherapy,Dosages, Radiotherapy,Radiotherapy Dosages
D002289 Carcinoma, Non-Small-Cell Lung A heterogeneous aggregate of at least three distinct histological types of lung cancer, including SQUAMOUS CELL CARCINOMA; ADENOCARCINOMA; and LARGE CELL CARCINOMA. They are dealt with collectively because of their shared treatment strategy. Carcinoma, Non-Small Cell Lung,Non-Small Cell Lung Cancer,Non-Small Cell Lung Carcinoma,Non-Small-Cell Lung Carcinoma,Nonsmall Cell Lung Cancer,Carcinoma, Non Small Cell Lung,Carcinomas, Non-Small-Cell Lung,Lung Carcinoma, Non-Small-Cell,Lung Carcinomas, Non-Small-Cell,Non Small Cell Lung Carcinoma,Non-Small-Cell Lung Carcinomas
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000069473 Radiation Dose Hypofractionation A treatment schedule in which the total dose of radiation is divided into large doses but fewer exposure times. Hypofractionated Dose, Radiation,Radiotherapy Dose Hypofractionation,Radiotherapy Minibeams,Dose Hypofractionation, Radiation,Dose Hypofractionation, Radiotherapy,Hypofractionation, Radiation Dose,Hypofractionation, Radiotherapy Dose,Hypofractionations, Radiotherapy Dose,Minibeam, Radiotherapy,Radiation Hypofractionated Dose,Radiotherapy Minibeam

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