Comparison 12.

Postoperative intra‐abdominal complications

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 All studies	4	252	Risk Ratio (M‐H, Fixed, 95% CI)	0.74 [0.42, 1.31]
1.1 Parenteral nutrition	1	124	Risk Ratio (M‐H, Fixed, 95% CI)	1.01 [0.52, 1.97]
1.2 Enteral nutrition	1	60	Risk Ratio (M‐H, Fixed, 95% CI)	0.46 [0.10, 2.17]
1.3 Supplements	2	68	Risk Ratio (M‐H, Fixed, 95% CI)	0.30 [0.05, 1.74]
2 HCC	2	168	Risk Ratio (M‐H, Fixed, 95% CI)	0.85 [0.45, 1.58]
2.1 Parenteral nutrition	1	124	Risk Ratio (M‐H, Fixed, 95% CI)	1.01 [0.52, 1.97]
2.2 Enteral nutrition	0	0	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.3 Supplements	1	44	Risk Ratio (M‐H, Fixed, 95% CI)	0.27 [0.03, 2.26]