Table 4.

Correlation between autonomic function and disease severities.

Autonomic functions	Disease severity	r	P
SP difference in the tilting test	Unified Parkinson’s Disease Rating Scale (UPDRS) II	–0.561	0.024
	UPDRS III	–0.573	0.020
	UPDRS total	–0.582	0.018
DP difference in the tilting test	UPDRS I	–0.587	0.017
	UPDRS II	–0.731	0.001
	UPDRS III	–0.647	0.007
	UPDRS total	–0.693	0.003