TABLE 1.

Demographic and clinical characteristics of the sample (mean ± SD).

Groups	PD	HC	t/χ2	p-value
Age (years)	61.0 ± 4.6	59.7 ± 4.3	1.26	0.211
Sex (female/male)	17/19	18/19	0.02	0.903
Education	12.0 ± 3.67	11.6 ± 4.7	0.41	0.681
MMSE	28.4 ± 1.6	29.0 ± 1.5	−1.61	0.112
Disease duration (years)	6.3 ± 4.3	NA
H and Y stage	2.2 ± 0.7	NA
LED dose (mg)	455.2 ± 232.4	NA

Group differences in age, education, and MMSE using two-sample t-test. Sex distribution assessed by chi-squared test. MMSE, Mini-Mental State Exam; H and Y, Hoehn and Yahr staging; LED, levodopa equivalent daily dose. NA, not available.