Table 2.

Demographics of the participants.

	PSP patients		PD patients		Controls
	Mean (SD)	Range	Mean (SD)	Range	Mean (SD)	Range
Age	66.82 (7.08)	53–77	63.33 (7.89)	50–80	62.70 (10.48)	39–88
Duration of symptoms (years)	3.73 (3.20)	1–11	5.67 (3.47)	0–14	—	—
Gender (female)	2	—	6	—	14	—
Education, mean years (SD)	15.27 (4.98)	10–26	14.33 (3.22)	9–23	12.25 (3.39)	9–25
HADS Depression	8.50 (5.50)	1–15	6.77 (4.39)	0–16	2.40 (1.81)	0–6
HADS Anxiety	8.50 (5.79)	2–17	9.17 (4.13)	3–18	4.83 (2.75)	0–11
Apathy	17.67 (12.04)	4–34	15.90 (10.26)	4–42	—	—

HADS: Hospital Anxiety and Depression Scale.