TY - JOUR
T1 - Comparative effectiveness of aggressive thoracic radiation therapy and concurrent chemoradiation therapy in metastatic lung cancer
AU - Koshy, Matthew
AU - Malik, Renuka
AU - Mahmood, Usama
AU - Rusthoven, Chad G.
AU - Sher, David J.
N1 - Publisher Copyright:
© 2015 American Society for Radiation Oncology.
PY - 2015/11
Y1 - 2015/11
N2 - Purpose: We aimed to determine the comparative effectiveness of radiation dose escalation and concurrent chemoradiation therapy (CCRT) in a population-based cohort of patients with stage IV non-small cell lung cancer who underwent palliative thoracic radiation therapy (RT). Methods and materials: The cohort consisted of 27,063 patients in the National Cancer Database with stage IV non-small cell lung cancer treated with thoracic RT between 20 and 55 Gy in 2004 to 2011. High- versus intermediate- vs low-dose (HD vs ID vs LD, respectively) RT was defined as biologically effective dose above 50 Gy, between 35 and 50 Gy, and below 35 Gy, respectively. Among patients who received any chemotherapy, separate analyses were performed to examine the impact of CCRT on overall survival (OS). Results: The median follow-up was 3.9 months for the entire cohort and 18 months for surviving patients. The 5 most common treatment schemes were 30/10 (Gy/fraction, 23% of entire cohort), 35/14 (8%), 37.5/15 (7%), 40/20 (3%), and 50/20 (3%). On multivariable analysis, the survival hazard ratios (HRs) for HD and ID compared with LD RT were 0.37 and 0.51, respectively (P <.0001). Propensity score matching found a superior survival benefit for ID and HD (HR, 0.41 and 0.57 for HD and ID RT, respectively, vs LD, P <.0001). Among those who received any chemotherapy (59% of total), the median OS for patients treated with CCRT (19% of total) was 5.3 versus 5.6 months (P =667). On multivariable analysis, the HR for CCRT was 1.01 (P =46). Conclusions: The delivery of higher-dose RT but not concurrent chemotherapy was associated with a significant improvement of OS. This population-based study supports higher-dose palliative regimens and motivates prospective study of escalation beyond a biologically effective dose of 35 Gy.
AB - Purpose: We aimed to determine the comparative effectiveness of radiation dose escalation and concurrent chemoradiation therapy (CCRT) in a population-based cohort of patients with stage IV non-small cell lung cancer who underwent palliative thoracic radiation therapy (RT). Methods and materials: The cohort consisted of 27,063 patients in the National Cancer Database with stage IV non-small cell lung cancer treated with thoracic RT between 20 and 55 Gy in 2004 to 2011. High- versus intermediate- vs low-dose (HD vs ID vs LD, respectively) RT was defined as biologically effective dose above 50 Gy, between 35 and 50 Gy, and below 35 Gy, respectively. Among patients who received any chemotherapy, separate analyses were performed to examine the impact of CCRT on overall survival (OS). Results: The median follow-up was 3.9 months for the entire cohort and 18 months for surviving patients. The 5 most common treatment schemes were 30/10 (Gy/fraction, 23% of entire cohort), 35/14 (8%), 37.5/15 (7%), 40/20 (3%), and 50/20 (3%). On multivariable analysis, the survival hazard ratios (HRs) for HD and ID compared with LD RT were 0.37 and 0.51, respectively (P <.0001). Propensity score matching found a superior survival benefit for ID and HD (HR, 0.41 and 0.57 for HD and ID RT, respectively, vs LD, P <.0001). Among those who received any chemotherapy (59% of total), the median OS for patients treated with CCRT (19% of total) was 5.3 versus 5.6 months (P =667). On multivariable analysis, the HR for CCRT was 1.01 (P =46). Conclusions: The delivery of higher-dose RT but not concurrent chemotherapy was associated with a significant improvement of OS. This population-based study supports higher-dose palliative regimens and motivates prospective study of escalation beyond a biologically effective dose of 35 Gy.
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U2 - 10.1016/j.prro.2015.07.009
DO - 10.1016/j.prro.2015.07.009
M3 - Article
C2 - 26412340
AN - SCOPUS:84946400153
SN - 1879-8500
VL - 5
SP - 374
EP - 382
JO - Practical Radiation Oncology
JF - Practical Radiation Oncology
IS - 6
ER -