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Table 5 Comparing complications in the two groups

From: Dexamethasone as a bupivacaine adjuvant for ultrasound-guided interscalene brachial plexus block: a prospective randomized study

  Group D (N = 22) Group C (N = 23) P value Effect of group D relative to group C
Mean ± SE 95% CI
Complications (n (%)) RR (95% CI)
Allergy to bupivacaine (ester) 0 (0.0%) 1 (4.5%) §0.999 Could not be calculated
Horner (presented by ptosis) 4 (18.2%) 5 (21.7%) §0.999 0.84 (0.26–2.72)
Limb paresthesia (probability of hematoma/intraneural injection) 1 (4.5%) 1 (4.3%) §0.999 1.05 (0.07–15.70)
Shortness of breath after extubation (probability of phrenic n affection) 3 (13.6%) 2 (8.7%) §0.665 1.57 (0.29–8.51)
Nausea/vomiting 1 (4.5%) 7 (30.4%) §0.047* 0.15 (0.02–1.12)
Skin allergy 1 (4.3%) 0 (0.0%) §0.999 Could not be calculated
  1. *Significant
  2. §Fisher’s exact test