Younger patients operated for lung cancer have a better prognosis

Tomasz Marjanski, Robert Dziedzic, Danush Davoodi, Sofie Josefsson, Wioletta Sawicka, Witold Rzyman
Journal of Thoracic Disease 2020, 12 (5): 2120-2128

Background: The incidence of lung cancer in the population of patients younger than 50 years of age is relatively low. The aim of this study was to compare the clinical outcomes of patients with early lung cancer onset (ELCO, onset before the age of 50) and late lung cancer onset (LLCO, onset after the age of 50).

Methods: We have retrospectively analyzed the prospectively collected data of 1,518 patients with lung cancer treated in a Thoracic Surgery Department in the years 2007-2015. Including carcinoid tumors for the analysis may blur ELCO and LLCO population comparison; therefore we have made three analyses. We have compared overall survival (OS) in unmatched (86 patients with ELCO and 1,432 patients with LLCO) and matched the populations (with the use of propensity-score matched analysis).

Results: In comparison of unmatched patients, five-year survival in patients with ELCO was 71.9% compared to 58.7% in LLCO patients (P=0.008). In comparison of matched populations (comparing sex, pTNM, type of operation, pathological diagnosis and Charlson Comorbidity Index) five-year survival in patients with ELCO was 77.6% comparing to 61.5% in LLCO patients P<0.001). After exclusion of rare histological types of lung cancer and advanced stages no significant difference in survival rates was discovered comparing ELCO patients with LLCO patients, although there was still a trend towards better survival in ELCO patients (P=0.086).

Conclusions: Patients with ELCO have higher five-year survival after surgical treatment compared to patients with LLCO.

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