MAPT and Headache: Plasma UCH-L1 and Tau showed highest correlation with headache (r = 0.74 and 0.78, respectively, both p < 0.001), sleep disturbance (r = 0.69 and 0.84, respectively, both p < 0.001), and cognitive symptoms, including forgetfulness (r = 0.76 and 0.74, respectively, both p < 0.001), poor concentration (r = 0.68 and 0.76, respectively, both p < 0.001), and time required for information processing (r = 0.77 and 0.81, respectively, both p < 0.001).