Patient baseline, intraoperative and postoperative characteristics within the clusters in patients aged > 10 days.

Data are shown as means and standard deviations, or as numbers and percentages, unless stated otherwise.athe “Decreasing cluster” was taken as reference. According to the Bonferroni correction, the significance level was set to 0.025.ban expert-based stratification of the surgical complexity, potential for morbidity and mortality, ranging between 1.5 and 15 [22].conly reliable measurements were compared.din 30-day survivors.ECMO: extracorporeal membrane oxygenation.