Comparison 2. Sensitivity analysis ‐ variable anaesthetic doses and different local anaesthetics excluded.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Failure to achieve adequate anaesthesia to begin surgery	1	238	Risk Ratio (M‐H, Random, 95% CI)	2.37 [0.94, 5.97]
2 Need for another anaesthetic technique during surgery	1	238	Risk Ratio (M‐H, Random, 95% CI)	1.53 [0.56, 4.15]
3 Women unsatisfied with anaesthetic	1	238	Risk Ratio (M‐H, Random, 95% CI)	1.02 [0.72, 1.43]
4 Treatment for hypotension after commencement of anaesthetic	1	238	Risk Ratio (M‐H, Random, 95% CI)	1.10 [0.87, 1.39]
5 Time for surgery to commence	2	278	Mean Difference (IV, Random, 95% CI)	‐5.79 [‐13.83, 2.24]