Table 1.

Clinical and demographic characteristics of PD patients at initial evaluation

No. of patients	247
Mean age ± SD, y	71.5±7.7
Sex (male), n (%)	111 (44.9%)
Mean course ± SD, y	4.1±2.5
Education
Illiteracy, n (%)	24 (9.7%)
Primary school, n (%)	51 (20.69%)
Middle school and above, n (%)	82 (33.2%)
College and above, n (%)	90 (36.4%)
MMSE score at initial evaluation	20.1±2.9
HY scale at initial evaluation	2.1±1.3

MMSE: Mini-Mental State Examination; HY scale: Hoehn and Yahr scale.