Impacts of sarcopenia with or without obesity on patients with gastric cancer

Abstract Background Obesity and sarcopenia are both viewed as pathological body composition issues and indicators of compromised nutritional status. The aim of this study was to evaluate the effects of sarcopenic obesity on short- and long-term clinical outcomes. Methods The clinical data of patients who underwent radical gastrectomy between 2013 and 2019 were prospectively collected. Sarcopenia is defined by European Working Group on Sarcopenia in Older People (EWGSOP2) and obesity is defined by the body mass index (BMI). To identify the independent predictors of postoperative complications and overall survival, we performed univariate and multivariate logistic and Cox regression analyses. Results In a total of 508 cases, 372 (73.2%) cases were diagnosed with non-sarcopenia, 112 (22.0%) with non-obese sarcopenia, and 24 (4.7%) with sarcopenic obesity. In the multivariate logistic regression, both of non-obese sarcopenia (OR = 2.305, 95% CI = 1.444–3.679, P < 0.001) and sarcopenic obesity (OR = 2.589, 95% CI = 1.088–6.156, P = 0.031) were independent risk factors for postoperative complications. In the multivariate Cox analysis, only non-obese sarcopenia (HR = 2.614, 95% CI = 1.882–3.631, P < 0.001) was independent risk factor for overall survival. Conclusions Sarcopenic obesity serves as an independent risk factor for postoperative complications, but not for overall survival.