APOE and Behcet disease: The partial correlation analysis revealed that, in the APOE ε3 group, BG was negatively correlated with the cognitive scores from the RAVL-I (r = − 0.200, p = 0.005), COWAT (r = − 0.169, p = 0.019), RAVL-D (r = − 0.144, p = 0.040), and WAIS-BD (r = − 0.145, p = 0.045) tests.