Data are expressed as either median (interquartile range) or numbers (percentage).
a Age-adjusted comorbidity index described by Charlson et al. 28
b In patients presenting a drop in postoperative hematocrit, calculated as the difference between postoperative (within 48h post-surgery) and preoperative values. Six cases were excluded because of a gain in hematocrit values (corresponding to 6 transfusions).
c Surgical complications were classified using two corresponding classification systems: the ClassIntra for intraoperative adverse events 26, and the Dindo-Clavien27 for postoperative complications.
d Including any of the following: laparotomy, extraperitoneal to transperitoneal, robotic-assisted to conventional
e The main outcome measure is defined in the text and table S1.
* The difference between the transperitoneal and extraperitoneal groups was significant (p =0.01), due to laparotomy conversions (0 vs. 6) and conversions from extraperitoneal to transperitoneal (6 cases).