Fig. 1: Left panel—fractional anisotropy (FA) differences between OCD patients and healthy controls for 25 white matter (WM) regions.

Gradient bar indicates Cohen’s d effect sizes after meta-analysis. Right Panel- Cohen’s d effect sizes after meta-analysis, including age, sex, age × sex, age2, and age2 × sex as covariates. Error bars represent 95% confidence intervals. Significant regions are highlighted in orange.