Comparison 9. Duration of sensory block: intravenous dexamethasone versus placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Duration of sensory block	8	499	Mean Difference (IV, Random, 95% CI)	6.21 [3.53, 8.88]
2 Duration sensory block: additive versus no additive subgroups	8	499	Mean Difference (IV, Random, 95% CI)	6.21 [3.53, 8.88]
2.1 Additives	1	49	Mean Difference (IV, Random, 95% CI)	6.20 [0.68, 11.72]
2.2 No additives	7	450	Mean Difference (IV, Random, 95% CI)	6.21 [3.33, 9.08]
3 Duration of sensory block: high‐ versus low‐dose dexamethasone subgroups	8	499	Mean Difference (IV, Random, 95% CI)	6.21 [3.53, 8.88]
3.1 High‐dose	6	437	Mean Difference (IV, Random, 95% CI)	7.45 [5.55, 9.35]
3.2 Low‐dose	2	62	Mean Difference (IV, Random, 95% CI)	2.25 [1.21, 3.30]
4 Duration of sensory block: high/unclear versus low risk of bias subgroups	8	499	Mean Difference (IV, Random, 95% CI)	6.21 [3.53, 8.88]
4.1 High/unclear risk of bias	2	62	Mean Difference (IV, Random, 95% CI)	2.25 [1.21, 3.30]
4.2 Low risk of bias	6	437	Mean Difference (IV, Random, 95% CI)	7.45 [5.55, 9.35]