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Survival by histologic subtype in stage IV nonsmall cell lung cancer based on data from the Surveillance, Epidemiology and End Results Program

Authors Cetin K, Ettinger DS, Hei Y, O'Malley CD

Published 28 April 2011 Volume 2011:3(1) Pages 139—148

DOI https://doi.org/10.2147/CLEP.S17191

Review by Single-blind

Peer reviewer comments 3

Karynsa Cetin1, David S Ettinger2, Yong-jiang Hei3, Cynthia D O'Malley1
1Center for Observational Research, Amgen Inc., Thousand Oaks, CA, USA; 2Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, USA; 3Global Development, Amgen Inc., Thousand Oaks, CA, USA

Background: The role of histology in the targeted management of nonsmall cell lung cancer (NSCLC) has garnered renewed attention in recent years. We provide contemporary population-based estimates of survival and an assessment of important prognostic factors in stage IV NSCLC by major histologic subtype.
Methods: Using data from the Surveillance, Epidemiology and End Results (SEER) Program, we stratified 51,749 incident stage IV NSCLC patients (1988–2003 with follow-up through 2006) by major histologic subtype. We used Kaplan–Meier and Cox proportional hazards methods to describe overall survival and the prognostic influence of select patient, tumor, and treatment characteristics for each histologic subgroup.
Results: Survival was highest in patients with bronchioloalveolar adenocarcinoma (1-year survival: 29.1%) and lowest in those with large cell tumors (1-year survival: 12.8%). Diagnosis in later years, female gender, younger age, either Asian/Pacific Islander or Hispanic race/ethnicity, lower tumor grade, and surgery or beam radiation as part of first-line treatment were generally independently associated with a decreased risk of death, but the prognostic significance of some of these factors (age, ethnicity, tumor grade) varied according to histologic subtype.
Conclusion: Findings demonstrate a poor prognosis across histologic subtypes in stage IV NSCLC patients but highlight differences in both absolute survival and the relative importance of select prognostic factors by histologic subclassification. More research using other sources of population-based data could help clarify the role of histology in the presentation, management, and prognosis of late-stage NSCLC.

Keywords: epidemiology, nonsmall cell lung cancer, histology, survival

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