Figure 5. . Distribution of relative risk of concussed versus control athlete status in the setting of any worsening of time score from preseason baseline for the King-Devick test.

Dots represent point estimates of each study's relative risk; size of the gray box reflects the weight of the study in meta-analysis. Bars are 95% CI. The diamond shows the weighted estimate for the relative risk; this is determined from fixed-effects models account for study N and precision (narrowness of 95% CI). I² statistic values were 0.0%; p = 0.87, indicating very little heterogeneity between studies in calculation of the weighted estimate. Stated differently, the nonsignificance of the I² test for heterogeneity suggests that the differences between the studies are explicable by random variation. Study ID numbers are not consecutive since some studies did not have postinjury data.

RR: Relative risk; K-D: King-Devick.

Data taken from [29,30,47,48,50,53,54,72].