Sarcopenia as a predictor of postoperative risk of complications, mortality and length of stay following gastrointestinal oncological surgery.

INTRODUCTION Sarcopenia has drawn considerable attention as a predictor of postoperative risk, although the relationship between sarcopenia and postoperative risk is contentious. This meta-analysis was conducted to evaluate this relationship. METHODS A systematic literature search up to May 2020 was carried out and 43 studies were identified (with 16,716 patients) reporting on the relationship between sarcopenia and postoperative risk. In order to evaluate this relationship, odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using the dichotomous and continuous method with a random or fixed effects model. RESULTS Compared with non-sarcopenic patients, those with sarcopenia have a higher major complications rate (OR: 4.03, 95% CI: 2.49-5.57, p<0.001), a higher total complications rate (OR: 1.77, 95% CI: 1.40-2.24, p<0.001), a higher 30-day mortality rate (OR: 2.38, 95% CI: 1.56-3.63, p<0.001) and a longer hospital stay (mean difference: 4.54 days, 95% CI: 2.49-6.59 days, p<0.001). CONCLUSIONS Sarcopenia significantly increases the risk of major complications, total complications, 30-day mortality and length of hospital stay. For this reason, it is recommended that sarcopenia is added to preoperative risk evaluation to avoid any possible negative outcomes following gastrointestinal oncological surgery.