A similar correlation was observed in another study with MMSE (r = −0.43, p = 0.02), cognitive abilities screening instrument (CASI) (r = −0.56, p < 0.01), catechol-O-methyltransferase (COMT) (r = −0.45, p = 0.01 for immediate recall; r = −0.56, p < 0.01 for 5-min delayed recall; r = −0.71, p < 0.001 for 10-min delayed recall), and Alzheimer’s disease assessment scale-cognitive (ADAS-cog) scores (r = 0.59, p < 0.001) [56]. Here, COMT is linked to early-onset autosomal dominant Alzheimer disease.