Is Overweight Related to the Prognosis of Octogenarians with Lung Cancer?

Abstract

This study aimed to determine outcomes and prognostic factors associated with octogenarians who underwent pulmonary resection for lung cancer. From 2009 to 2018, 76 octogenarians who underwent pulmonary surgery for lung cancer were enrolled in this study. We divided them into two groups, namely overweight and non-overweight, and investigated their clinicopathological characteristics and outcomes. Disease-specific survival (DSS) rates were determined using Kaplan-Meier curves. Univariate and multivariate analyses were performed to identify prognostic factors. Although perioperative morbidity and mortality in octogenarians were not significantly different between the two groups, the long-term prognosis of the overweight group was significantly worse than that of the non-overweight group. The 3-year DSS rate was 56.5%. The median observation period after surgery was 37.5 (8.9-112.3) months for the entire cohort postoperatively. Kaplan-Meier curves showed that being overweight (body mass index ≥ 25) was associated with worse survival rates in all pathological stages (0 to III) and stage 0/I (DSS, p = 0.036 and p = 0.003, respectively). Multivariate analysis identified overweight as an unfavorable prognostic factor for DSS in patients with stage 0/I lung cancer (hazard ratio 2.240, 95% confidence intervals 1.052-4.564, p = 0.037). Overweight is an independent risk factor, especially in pathological stage 0/I lung cancer. Indications for surgery should be carefully considered in elderly patients with obesity. However, owing to the limitations of this retrospective single-center study, future studies involving multiple institutions are required to confirm our findings.