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The funnel plot of prevalence for CVD is approximately symmetric that in accord to results of Egger's (P = 0.000) and Begg's (P = 0.147) tests faded the possibility of the potential publication bias. However, to further assess the effect of missing studies on the summary effect, the trim and fill approach was applied and showed that after filling the missing studies the summary effect didn't change significantly. Odd ratio of CVD.
