Table 2.

Regression of Modified UPDRS Score (on the log scale) and Demographic Variables

Variable	Estimate (SE)	p Value
Race (White vs AA)	0.11 (0.019)	<.0001
Gender (men vs women)	0.026 (0.019)	.172
Education	−0.003 (0.003)	.223
Age at visit	0.014 (0.001)	<.0001
Baseline income	−0.019 (0.004)	<.0001
Age × race (White vs AA)	0.004 (0.003)	.10

Notes: R² = 0.19. White, older age, and lower income were associated with higher score. AA = African American; SE = standard error; UPDRS = Unified Parkinson’s Disease Rating Scale.