Comparison 5. Paraesthesia by subgroups.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 By type of intervention/comparison	6	471	Odds Ratio (M‐H, Fixed, 95% CI)	0.42 [0.23, 0.76]
1.1 peripheral nerve stimulation	5	431	Odds Ratio (M‐H, Fixed, 95% CI)	0.46 [0.25, 0.86]
1.2 landmark technique	1	40	Odds Ratio (M‐H, Fixed, 95% CI)	0.16 [0.02, 1.50]
2 By type of nerve block/approach	6	471	Odds Ratio (M‐H, Fixed, 95% CI)	0.42 [0.23, 0.76]
2.1 axillary brachial plexus	3	250	Odds Ratio (M‐H, Fixed, 95% CI)	0.58 [0.19, 1.79]
2.2 infraclavicular brachial plexus	3	221	Odds Ratio (M‐H, Fixed, 95% CI)	0.38 [0.19, 0.76]