Comparison 11. Incidence of mild to moderate adverse events: intravenous dexamethasone versus placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Overall incidence of block‐related adverse events	5	393	Risk Ratio (M‐H, Random, 95% CI)	1.09 [0.69, 1.70]
2 Numbness/tingling 14 days after surgery	2	101	Risk Ratio (M‐H, Random, 95% CI)	1.69 [0.31, 9.26]
3 Residual motor block/muscle weakness 24 hours after surgery	3	265	Risk Ratio (M‐H, Random, 95% CI)	2.68 [0.80, 8.90]
4 Horner syndrome	2	214	Risk Ratio (M‐H, Random, 95% CI)	0.89 [0.63, 1.26]
5 Hoarsenss	2	215	Risk Ratio (M‐H, Random, 95% CI)	0.88 [0.45, 1.71]
6 Dyspnoea	3	219	Risk Ratio (M‐H, Random, 95% CI)	0.63 [0.11, 3.74]
7 Cranial nerve 12 palsy	1	78	Risk Ratio (M‐H, Random, 95% CI)	0.37 [0.02, 8.77]
8 Overall non‐block‐related adverse events	5	258	Risk Ratio (M‐H, Random, 95% CI)	1.23 [0.38, 3.97]
9 Postoperative nausea and vomiting	3	134	Risk Ratio (M‐H, Random, 95% CI)	0.66 [0.12, 3.78]
10 Dermatological symptoms	2	124	Risk Ratio (M‐H, Random, 95% CI)	1.88 [0.09, 40.62]
11 Dizziness/wrist, hand or finger pain, constipation	1	78	Risk Ratio (M‐H, Random, 95% CI)	0.37 [0.02, 8.77]