However, these results are mixed, as some studies reveal that TL is not significantly associated with AD condition (Hinterberger et al., 2017; Lukens et al., 2009), shorter TL is associated with better cognitive performance in AD patients (Liu et al., 2016), and longer TL is associated with increased risks of AD (Fani et al., 2020), especially in individuals of Aβ‐ and tau‐positive (Mahoney et al., 2019). Here, MAPT is linked to Alzheimer disease.