Table 2.

Estimated coefficients of the linear regression model.

	Estimate	SE	tStat	p-value
Intercept	554.45	163.72	3.387	0.015
TH+ loss in SNpc	−7.47	2.21	−3.377	0.015
PD symptoms	−5.54	1.63	−3.385	0.015
TH+ loss : PD symptoms	0.07	0.02	3.378	0.015