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Lung dose and the potential risk of death in postoperative radiation therapy for non-small cell lung cancer: A study using the method of stratified grouping

Authors
Heo, J; Noh, OK; Kim, HI; Chun, M; Cho, O; Park, RW; Yoon, D; Oh, YT
Citation
Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 129(1):61-67, 2018
Journal Title
Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology
ISSN
0167-81401879-0887
Abstract
PURPOSE: Postoperative radiation therapy may have a detrimental effect on survival in patients with non-small cell lung cancer. We investigated the association of the lung radiation dose with the risk of death in patients treated with postoperative radiation therapy.
METHODS: We analyzed 178 patients with non-small cell lung cancer who received postoperative radiation therapy. The mean lung dose was calculated from dose-volume data, and we categorized patients into the high and low lung dose groups using 2 different methods: (1) simple grouping using the median lung dose of all patients, and (2) stratified grouping using the median lung dose of each subgroup sharing the same confounders. We compared clinical variables, and survival between the high and low lung dose groups.
RESULTS: In the simple grouping, there were no significant differences in survivals between the high and low lung dose groups. After stratification, the overall survival of low lung dose group was significantly longer than that of high lung dose group (5-year survival, 60.1% vs. 35.3%, p=0.039). On multivariable analyses, the lung dose remained a significant prognostic factor for overall survival (hazard ratio, HR=2.08, p=0.019).
CONCLUSIONS: The lung dose was associated with the risk of death in patients with non-small cell lung cancer having the same confounders. Further studies evaluating the risk of death according to the lung dose will be helpful to administer more precise and individualized postoperative radiation therapy.
Keywords
Lung doseNon-small cell lung cancerPostoperative radiotherapyRisk of death
DOI
10.1016/j.radonc.2018.03.018
PMID
29681411
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Radiation Oncology
Journal Papers > School of Medicine / Graduate School of Medicine > Medical Informatics
AJOU Authors
노, 오규전, 미선조, 오연박, 래웅윤, 덕용오, 영택
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