Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
. Funnel plot of standard error by Hedges’ g for trials included in the meta-analysis. The open circles represent observed studies and the filled circles represent imputed studies. The open diamond represents the observed effect size. The closed diamond represents the imputed effect size from Duval and Tweedie’s (69) trim and fill procedure. Egger’s test of the intercept indicated bias in the funnel plots was not statistically significant (P = .16).
