showed a trendP<0.001
( 13 ) who state that the preoperative outcomes in the second period of surgeries [2016–2018]showed a trend towards better performance than in the first period [2013–2015], with shorter hospital (6.34±2.84 vs. 9.50±6.37 days, P<0.001), and ICU stays (1.15±0.59 vs. 1.94±2.08 days), and decreasing complication rates (19.40% vs. 45.80%, P=0.001), with an advantage in oncological results: 3-year OS of 73.5% [95% confidence interval (CI): 65.0–83.1%] vs. 57.4% (95% CI: 44.8–73.5%; P=0.047).