NEFL and diabetes mellitus: CSF NfL did not correlate with BMI (CSF NfL r = −0.32, p = 0.065), nor were they associated with presence of diabetes (t-test for CSF NfL |t| = 0.902, p = 0.389) or hypertension (t-test for CSF NfL|t| = 1.62, p = 0.117).