Surgery or radiotherapy improves survival in elderly patients with early non-small cell lung cancer: A population-based analysis.

ABSTRACT

OBJECTIVE: There is a lack of evidence to support a consensus on whether surgery or radiotherapy is optimal for elderly or very elderly patients with early-stage non-small cell lung cancer (NSCLC). We aimed to assess the impact of surgery or radiotherapy on survival in elderly (≥70 years) and very elderly (≥80 years) patients with early-stage NSCLC. METHODS: Patients aged ≥70 years diagnosed with early-stage NSCLC between January 1, 1975, and December 31, 2018, were identified in the Surveillance, Epidemiology, and End Results (SEER) database. Overall survival (OS) and cancer-specific survival (CSS) were assessed based on surgery, radiotherapy, and no-treatment groups. RESULTS: Data for 15,224 NSCLC patients aged ≥70 years were collected, which consisted of 6949 (45.6%) patients who underwent surgery alone, 5014 (32.9%) who underwent radiotherapy alone, and 3261 (21.5%) who received no treatment. Surgery significantly improved patient survival compared with no treatment (MST 74 months vs. 7 months, HR 0.201, 95% CI 0.186-0.217, P < 0.001), as did radiotherapy (MST 28 months vs. 7 months, HR 0.440; 95% CI 0.413-0.469, P < 0.001). Surgery also resulted in improved survival compared with radiotherapy (74 months vs. 28 months, HR 0.455; 95% CI 0.430-0.482, P < 0.001). A similar conclusion was made from the analysis of CSS. A subgroup analysis further confirmed the survival benefits. CONCLUSIONS: The results of this large-scale retrospective study indicate that both surgery and radiotherapy significantly enhance survival outcomes in patients aged ≥70 or ≥80 years with early-stage NSCLC. The survival benefits of surgery were particularly notable.