Table 1.

Clinical Characteristics at Baseline

Variable	All Mean (SD) or N (%)	No Parkinsonism Mean (SD) or N (%)	Possible Parkinsonism Mean (SD) or N (%)	Parkinsonism Mean (SD) or N (%)
Cases	2,962	1,301 (43.9%)	885 (29.9%)	776 (26.2%)
Demographics
Age at Baseline (years)	78.3 (7.82)	75.1 (7.49)	79.7 (7.21)	81.9 (6.92)
Sex (female)	2,138 (72.2%)	995 (76.5%)	614 (69.4%)	529 (68.2%)
White, non-Hispanic	2,608 (88.1%)	1,083 (83.3%)	795 (89.9%)	730 (94.2%)
Education (years)	16.0 (3.76)	16.5 (3.80)	15.8 (3.80)	15.5 (3/88)
MMSE (score 30)	27.7 (3.16)	28.4 (2.31)	27.6 (3.0)	26.5 (4.09)
Global cognition	−0.01 ().65)	0.20 (0.55)	−0.07 (0.63)	−0.30 (0.71)
Cognitive Diagnosis
No cognitive impairment	2,021 (68.7%)	992 (76.8%)	586 (66.6%)	443 (57.4%)
Mild cognitive impairment	740 (25.1%)	269 (20.8%)	241 (27.4%)	230 (29.8%)
Dementia	184 (6.2%)	31 (2.4%)	53 (6.0%)	100 (12.9%)
Self-Report Conditions
Hypertension	1,442 (48.7%)	595 (45.7%)	443 (50.1%)	404 (52.1%)
Diabetes	363 (12.3%)	127 (9.8%)	126 (14.3%)	110 (14.2%)
Myocardial infarction	311 (10.5%)	104 (8.0%)	105 (11.9%)	102 (13.2%)
Cancer	895 (30.3%)	392 (30.1%)	261 (29.5%)	242 (31.3%)
Thyroid disorder	545 (18.4%)	229 (17.6%)	165 (18.7%)	151 (19.5%)
Head trauma	203 (6.9%)	91 (7.0%)	59 (6.7%)	53 (6.9%)
Stroke	235 (8.6%)	53 (4.5%)	83 (10.0%)	99 (13.5%)
Parkinson’s disease	67 (2.3%)	14 (1.1.%)	12 (1.4%)	41 (5.3%)
ADL disability	295 (10.0%)	25 (1.9%)	98 (11.1)	172 (22.4%)
Mobility disability	1,335 (45.3%)	355 (27.3%)	448 (51.0%)	532 (69.5%)
Medications
Neuroleptic	39 (1.3%)	9 (0.7%)	13 (1.48%)	17 (2.2%)
Thyroid replacement	484 (16.3%)	180 (13.8%)	160 (18.1%)	144 (18.6%)
Asthma medication	215 (7.3%)	87 (6.7%)	77 (8.7%)	51 (6.6%)
Antirdepressants	378 (12.8%)	120 (9.2%)	110 (12.4%)	148 (19.1%)

Notes: ADL = activity of daily living; MMSE = mini-mental state examination.