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Table 3 Outcome data of randomized controlled trials included in the meta-analysis

From: Antioxidant supplementation for the prevention of post-endoscopic retrograde cholangiopancreatography pancreatitis: a meta-analysis of randomized controlled trials

Study Antioxidant group Control group
  No. of patients (n) No. of PEP (n) PEP stratified by severity No. of patients (n) No. of PEP (n) PEP stratified by severity
    Mild Moderate Severe    Mild Moderate Severe
Wollschläger et al. [21] 20 2 NA NA NA 20 3 NA NA NA
Budzyńska et al. [22] 99 12 9 2 1 101 8 5 3 0
Lavy et al. [23] 141 14 10 4 0 180 17 9 4 4
Katsinelos et al. [24] 124 15 8 7 0 125 12 7 5 0
Katsinelos et al. [25] 125 4 4 0 0 118 21 8 11 2
Mosler et al. [26] 355 46 28 16 2 346 42 24 16 2
Milewski et al. [27] 55 4 NA NA NA 51 6 NA NA NA
Kapetanos et al. [28] 158 9 6 1 2 162 5 4 0 1
Romagnuolo et al. [29] 293 16 8 6 2 293 12 4 6 2
Martinez et al. [30] 85 2 NA NA NA 85 8 NA NA NA
Abbasinazari et al. [31] 29 3 2 1 0 45 5 3 2 0
  1. ERCP = endoscopic retrograde cholangiopancreatography, PEP = post-ERCP pancreatitis, NA = not available.