Notes: Cells not sharing a common superscript differ significantly (p<.05) from each other. rw = correlation coefficient, CI = confidence intervals, k = number of effect sizes, Z = z-score. *p<.05; **
* Statistically significantSummary table of the data from studies included on orofacial clefts; the table depicts comparative data using fixed and random effects model.
aCochran's chi-square Q statistic test used to assess the heterogeneity in subgroups.bCochran's chi-square Q statistic test used to assess the heterogeneity between subgroups.