RT Journal Article T1 Are there differences by sex in lung cancer characteristics at diagnosis? -a nationwide study A1 Ruano-Ravina, Alberto A1 Provencio, Mariano A1 Calvo de Juan, Virginia A1 Carcereny, Enric A1 Estival, Anna A1 Rodriguez-Abreu, Delvys A1 Benitez, Gretel A1 Lopez-Castro, Rafael A1 Belver, Marta A1 Guirado-Risueno, Maria A1 Guirao-Rubio, Carlos A1 Blasco, Ana A1 Massuti, Bartomeu A1 Ortega, Ana Laura A1 Cobo, Manuel A1 Mosquera-Martinez, Joaquin A1 Aguado de la Rosa, Carlos A1 Bosch-Barrera, Joaquim A1 Sanchez-Gastaldo, Amparo A1 del Barco Morillo, Edel A1 Juan, Oscar A1 Domine, Manuel A1 Trigo, Jose Manuel A1 Pereiro Corbacho, Diego A1 Oramas, Juana K1 Lung neoplasms K1 symptoms K1 sex K1 smoking K1 small cell lung cancer (SCLC) K1 Gender K1 Survival K1 Stage AB Background: Lung cancer causes approximately 25% of all cancer deaths. Despite its relevance, few studies have analyzed differences by sex at the time of diagnosis in terms of symptoms, stage, age or smoking status. We aim to assess if there are differences between men and women on these characteristics at diagnosis. Methods: We analyzed the Thoracic Tumour Registry (TTR), sponsored by the Spanish Lung Cancer Group using a case-series design. This is a nationwide registry of lung cancer cases which started recruitment in 2016. For each case included, clinicians fulfilled an electronic record registering demographic data, symptoms, exposure to lung cancer risk factors, and treatment received in detail. We compared men and women using descriptive statistics. Results: A total of 13,590 participants took part in this study, 25.6% women. Women were 4 years younger than men (64 vs. 69), and men had smoked more frequently. Adenocarcinoma was the most frequent histological type in both sexes. Stage IV at diagnosis was 50.8% in women compared to 43.6% in men. Weight loss/anorexia/asthenia was the most frequent symptom in both sexes and there were no differences in the number of symptoms at diagnosis. There were no relevant differences in the frequency or number of symptoms by sex when non-small cell lung cancer (NSCLC) and small-cell lung cancer (SCLC) were analyzed separately. Smoking status did not appear to cause different lung cancer presentation in men compared to women. Conclusions: There seems to be no differences in lung cancer characteristics by sex at the time at diagnosis on stage, specific symptoms or number of symptoms. PB Ame publishing company SN 2218-6751 YR 2021 FD 2021-10-01 LK https://hdl.handle.net/10668/26627 UL https://hdl.handle.net/10668/26627 LA en DS RISalud RD Apr 8, 2025