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 |