Fig. 2.

A funnel plot of log risk ratio (RR) of the incidence in the studies of carpal tunnel syndrome among workers is used for explorative tool to inspect publication bias. The plot shows treatment effects versus the study size that is estimated from standard error (s.e.) of log(RR). Open circles indicate individual studies in this meta-analysis. The broken line is pseudo 95% confidence interval of measure of effect in the study. The asymmetrical plot indicates smaller studies with stronger effects missing. RR, relative risk.