Comparison 5. Pre‐operatively administered multiple agent, single dose Antibiotics vs Placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Wound infection	2	215	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.14 [0.05, 0.39]
1.1 Appendicitis	1	133	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.12 [0.02, 0.61]
1.2 Simple appendicitis	1	82	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.16 [0.04, 0.59]
1.3 Complicated appendicitis	0	0	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.0 [0.0, 0.0]
2 Postoperative intra abdominal abscess	0	0	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.1 Appendicitis	0	0	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.2 Simple appendicitis	0	0	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.3 Complicated appendicitis	0	0	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.0 [0.0, 0.0]
3 Length of stay in hospital	0	0	Mean Difference (IV, Fixed, 95% CI)	0.0 [0.0, 0.0]