Table 1.
Demographics of the Community-Based Sample
| AA, N = 1272 | White, N = 3335 | p Value | |
|---|---|---|---|
| Age at visit, mean (SD)1 | 79 (6.88) | 84.23 (7.39) | <.0001 |
| Sex, n (%) | <.0001 | ||
| Women | 1007 (79.17) | 2402 (72.02) | |
| Men | 265 (20.83) | 933 (27.98) | |
| Education, median (IQR)1 | 14 (5) | 16 (5) | <.0001 |
| Baseline income level, n (%)1706 | <.0001 | ||
| $0 to $4999 | 12 (1.05) | 38 (2.16) | |
| $5000 to $9999 | 76 (6.64) | 60 (3.41) | |
| $10 000 to $14 999 | 137 (11.98) | 113 (6.43) | |
| $15 000 to $19 999 | 105 (9.18) | 131 (7.46) | |
| $20 000 to $24 999 | 121 (10.58) | 133 (7.57) | |
| $25 000 to $29 999 | 92 (8.04) | 131 (7.46) | |
| $30 000 to $34 999 | 114 (9.97) | 172 (9.79) | |
| $35 000 to $49 999 | 161 (14.07) | 302 (17.19) | |
| $50 000 to $74 999 | 171 (14.95) | 315 (17.93) | |
| $75 000 and over | 155 (13.55) | 362 (20.6) | |
| Modified UPDRS score, median (IQR)1884 | 32 (15) | 41 (22) | <.0001 |
| Clinical Parkinson’s disease, n (%)247 | 5 (0.44) | 25 (0.78) | .23 |
| Parkinsonism, n (%)1556 | 115 (16.72) | 913 (38.64) | <.0001 |
Notes: Superscripts are number of missing data. AA = African American; IQR = interquartile range; modified UPDRS = modified Unified Parkinson’s Disease Rating Scale; SD = standard deviation.