Effect of Age at Injury

A random effects meta-regression was conducted to determine the effect of age at injury on Hedge's  g for internalizing symptoms with GCS included as a covariate. The overall model was nonsignificant Q(2) = 5.24,  p = .0729. Goodness of fit indices indicated that the model explained a significant non-zero proportion of variance  Q (13) = 29.56,  p = .0054 with  R2  analog explaining the proportion of between-study variance explained by the model at 0.25. The coefficient for GCS was significant, 𝛽 = 0.0502, p = 0.0230.  Age at injury was not a significant predictor of internalizing symptom severity, 𝛽 = 0.0164, p = 0.7534. See Table ? for confidence intervals.