NEFL and dementia: In patients with FTLD dementia, Ng positively correlated with t-tau (r = .82, p < .001) and p-tau 181 (r = .84, p < .001), and negatively with Aβ1−42/1−40 (r=-.64, p < .001) and serum NfL (r=-.44, p = .018).