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Table 4 Meta-analysis of all seven included RCTs together with two articles only with abstract

From: A meta-analysis for the effect of prophylactic GTN on the incidence of post-ERCP pancreatitis and on the successful rate of cannulation of bile ducts

Trials Subgroup(N) Risk ratio (95%) CI Z P value Heterogeneity
      x2 P I2,%
The effect of GTN on the primary rate of cannulation
all forms# 7 studies(n = 1233) 1.02 [0.96, 1.07] 0.57 0.57 6.22 0.40 3.6
all forms* 5 studies(n = 900) 0.99 [0.93, 1.06] 0.32 0.75 2.41 0.66 0
sublingual form# 3 studies(n = 587) 1.01 [0.93, 1.09] 0.22 0.83 6.12 0.05 67.3
topical form 2 studies(n = 184) 1.04 [0.91, 1.19] 0.59 0.56 0.00 0.95 0
The effect of GTN on the overall rate of cannulation
all forms# 8 studies(n = 1376) 1.01 [0.99, 1.04] 1.01 0.31 8.87 0.26 21.1
all forms* 7 studies(n = 1294) 1.01 [0.99, 1.04] 1.04 0.30 8.98 0.17 32.3
sublingual form# 3 studies(n = 552) 1.06 [0.98, 1.15] 1.95 0.05 2.91 0.23 31.3
topical form 2 studies(n = 184) 1.01 [0.96, 1.06] 0.45 0.65 0.39 0.53 0
  1. #: analysis with one or both of the two articles only with abstract available
  2. *: analysis without the two articles only with abstract available