Fig. 7
From: Associations of sleep disorders with serum neurofilament light chain levels in Parkinson’s disease
Associations between change rates of daytime sleepiness scores and change rates of serum NfL levels. Increased possibilities of daytime sleepiness when sitting inactive in public places (A), sitting and talking to someone (B), sitting quietly after lunch (C), and stopping in traffic in a car (D) in PD females are associated with faster increases of serum NfL levels. In prodromal PD females, increased possibilities of daytime sleepiness while stopped in traffic in a car (E), are also associated with faster increases in serum NfL levels