Definition Number of study OR (95% CI) P value
Definition 1 (ROEA) 7 0.72[0.58  0.89] 0.003
Definition 2 (ROSC) 20 0.52 [0.41  0.67] <0.001
Definition 3 (Survival) 4 0.50 [0.38  0.65] <0.001
Table 4: Results of meta-analysis based on the definition of defibrillation success