PINK1 and Alzheimer disease: Similar results were observed in serum (F [2] = 4.57, p = 0.012 η2 = 0.04) with higher PINK1 in AD dementia individuals (6.4 ± 13.3 ng/mL) than in MCI-AD (3.2 ± 6.8 ng/mL) (p = 0.008) (Figure 1B).