OR (95% CI)–Odds ratio (95% Confidence interval). (1) It was not possible to estimate OR-100,0% had success in both groups. Heterogeneity test–Chi (5) = 13.20 ().I2 = 62.1%. Global test–t(5) = 0.74 (). Heterogeneity chi-squared = 12.13 (d.f. = 4) ,I-squared (variation in OR attributable to heterogeneity) = 67.0%, Estimate of between-study variance Tau-squared = 0.6647, Test of OR = 1: t(4) = 0.98 Prob > |t| = 0.382.