APOE and Cognitive impairment: Among APOE ε4 non-carriers, GG homozygotes exhibited associations with multiple cognitive deficits compared with C allele carriers: prolonged TMT-A completion times [β = 12.41, 95% CI (2.05, 22.76), p = 0.019], indicating impaired visual search efficiency, worse score for VFT [β = −4.47, 95% CI (−7.71, –1.24), p = 0.007], VFT-animal [β = −1.96, 95% CI (−3.51, –0.41), p = 0.014], and VFT-fruit [β = −1.48, 95% CI (−2.63, –0.32), p = 0.013], which may indicate that negative effects of GG homozygotes on language function.