Table 1.

Patient and control participant demographics (mean +/− SD). All controls were age and sex matched to a patient. Only BDI differed between groups. BDI = Beck Depression Inventory, MMSE = Mini Mental State Exam, NAART = North American Adult Reading Test, UPDRS = United Parkinson’s Disease Rating Scale (motor), LED = L-Dopa equivalence dose in mg.

	PD	CTL	Statistic
Sex	17 M, 11 F	17 M, 11 F
Age	69.75 (8.59)	69.21 (9.23)	t(54)=−.23, p=.82
Years of Education	17.25 (3.24)	16.63 (3.13)	t(54)=−.72, p=.47
Parent’s Years Ed	12.49 (3.82)	12.37 (3.41)	t(54)=−.23, p=.82
MMSE	28.64 (1.06)	28.82 (1.02)	t(54)=.64, p=.52
NAART	45.04 (10.20)	47.00 (7.36)	t(54)=.83, p=.41
BDI	7.64 (5.23)	4.93 (4.69)	t(54)=−2.05, p=.046
UPDRS ON	22.14 (10.15)
UPDRS OFF	23.79 (8.71)
LED	703 (440)
Years since Diagnosis	5.54 (4.18)