Table 3.

Comparison of clinical/neurological features between 3 groups based on their MMSE score

	Low score (n = 105)	Middle score (n = 93)	High score (n = 106)
Age, years	73.9±7.1	71.0±7.4	67.1±8.7
Education, years	11.6±3.2	12.3±2.7	13.2±2.3
Disease duration, years	6.5±5.0	7.5±5.8	5.8±4.5
H&Y stage	2.9±0.8	2.7±0.7	2.6±0.6

Data are means ± SD. Low score = 12–25; middle score = 26–28; high score = 29–30.