Anastomotic Leakage Probability Score

defined as weight loss > 5% in 1 month or > 10% in 6 months or by BMI < 18kg/m2 or albumin < 35g/L before the intervention

defined as an association between laparoscopy and thoracotomy or laparotomy and thoracoscopy

radio or chemotherapy before intervention

white-cells count on postoperative day 5

amylase thoracic-drain level on postoperative day 5

C-Reactive Protein (CRP) serum-level on postoperative day 5

septic inflammatory response syndrome (SIRS) defined as the presence of 2 criterias or more among temperature > 38°C or < 36°C, cardiac frequency > 90/min, respiratory frequency > 20/min or PaCO2 < 32mmHg, and white-cells count > 12G/L or < 4G/L or circulating immature forms.

pain level measured by visual analogue scale on postoperative day 5

Acute respiratory distress syndrome was defined with the Berlin criterias (PaO2/FiO2 < 300, respiratory failure should have developed within 1 week, was not fully explained by cardiac failure, and chest imaging should include bilateral opacities not fully explained by effusions, atelectasis or nodules) in the 4 first postoperative days

defined as a hemodynamic instability (mean arterial pressure < 65 mmHg) despite of fluid load by crystalloids (35mL/kg) or with arterial lactate > 2mmol/L or which requires the use of vasopressors in the 4 first postoperative days

if orotracheal intubation was necessary in the 4 first postoperative days after extubation of the patient