Table 2. Characteristics of the studies included for pooled-analysis.

Abbreviations: months (mo), minimally invasive surgery (MIS).

Study	Design	Study interval	Operation	Indication (acute/elective)	n	Major Complication
Almeida et at. (2012) [32]	Retrospective	22 mo	Colorectal resection	Both	173	21 of 173 (12.1%)
Garcia-Granero et al. (2013)[35]	Prospective	17 mo	Colorectal resection	Both	205	17 of 205 (8.3%)
Kørner et al. (2009) [27]	Retrospective	12 mo	Colorectal resection	Both	231	23 of 231 (10%)
Lagoutte et al. (2012) [39]	Retrospective	14 mo	Colorectal resection	Both	100	20 of 100 (20%)
Pedersenet al. (2012) [37]	Retrospective	12 mo	MIS Colorectal resection	Both	163	41 of 163 (25.2%)
Scepanovic et al. (2013) [38]	Prospective	18 mo	Al digestive resections with anastomosis	Both	156	15 of 156 (9.6%)
Straatman et al. (2014) [1]	Retrospective	24 mo	All digestive resections with anastomosis/ostomy	Both	399	82 of 399 (20.6%)