RT Journal Article T1 Prognostic factors for survival in patients with metastatic lung adenocarcinoma: An analysis of the SEER database A1 Campos-Balea, Begoña A1 de Castro Carpeño, Javier A1 Massutí, Bartomeu A1 Vicente-Baz, David A1 Pérez Parente, Diego A1 Ruiz-Gracia, Pedro A1 Crama, Leonardo A1 Cobo Dols, Manuel K1 Lung adenocarcinoma K1 Metastasis K1 Non-small cell lung cancer K1 Overall survival K1 Prognostic factor K1 Adenocarcinoma del pulmón K1 Metástasis neoplásica K1 Carcinoma de pulmón de células no pequeñas K1 Pronóstico AB Background: Lung adenocarcinoma (ADC) is the main cause of death related to lung cancer. The aim of this study was to identify poor prognostic factors for overall survival (OS) in patients with stage IV lung ADC in real-world clinical practice.Methods: Patients were selected from the Surveillance Epidemiology and End Results (SEER) database. Chi-square bivariate analysis was used for the association of binary qualitative variables. A multivariate Cox regression analysis was performed to determine the impact of these prognostic factors on OS.Results: A total of 46 030 patients were included (51.3% men, mean age 67.03 ± 11.6), of whom 41.3% presented with metastases in bone, 28.9% in brain, 17.1% in liver and 31.8% in lung. Patients with liver metastases presented with two or more metastatic sites more frequently than patients without liver metastases (P < 0.001). Male sex (HR 0.78, 95% CI: 0.76-0.80), age ≥ 65 years (HR 1.37, 95% CI: 1.33-1.40), lack of family support (HR 0.80, 95% CI: 0.78-0.81) and presence of liver (HR 1.45, 95% CI: 1.40-1.50), bone (HR 1.21, 95% CI: 1.18-1.24) or brain metastases (HR 1.18, 95% CI: 1.15-1.21) were identified as poor prognostic factors for OS. Patients with liver metastasis showed the highest hazard ratio value (P < 0.001).Conclusions: The presence of liver metastases was the worst prognostic factor for patients with metastatic lung ADC. This factor should be considered as a stratification factor for future studies evaluating new cancer treatments including immunotherapy. PB China Lung Oncology Group and John Wiley & Sons Australia, Ltd. SN 1759-7706 YR 2020 FD 2020 LK http://hdl.handle.net/10668/3848 UL http://hdl.handle.net/10668/3848 LA en NO Campos-Balea B, de Castro Carpeño J, Massutí B, Vicente-Baz D, Pérez Parente D, Ruiz-Gracia P, et al. Prognostic factors for survival in patients with metastatic lung adenocarcinoma: An analysis of the SEER database. Thorac Cancer. 2020 Nov;11(11):3357-3364 DS RISalud RD Apr 10, 2025