Comparison 1. Abdominal wall lift with pneumoperitoneum versus pneumoperitoneum.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality			Other data	No numeric data
2 Adverse events	1		Rate Ratio (Fixed, 95% CI)	Subtotals only
2.1 Serious adverse events	1		Rate Ratio (Fixed, 95% CI)	1.0 [0.14, 7.10]
2.2 Unknown severity	1		Rate Ratio (Fixed, 95% CI)	1.99 [0.36, 10.97]
3 Conversion to open cholecystectomy			Other data	No numeric data
4 Operating time	4	107	Mean Difference (IV, Random, 95% CI)	13.39 [‐2.73, 29.51]