Table 4. Correlation of clinical parameters with the striatal uptake ratio (SUR) in IPD patients ( n  = 28) .

		Age	Age of onset	Duration of disease	Hoehn and Yahr score
Total SUR	rho	–0.056	–0.142	0.131	–0.229
	p	0.777	0.470	0.506	0.241
Contralateral SUR	rho	0.016	–0.068	0.277	–0.354
	p	0.93	0.732	0.153	0.065
Ipsilateral SUR	rho	–0.108	–0.179	–0.011	–0.021
	p	0.586	0.362	0.955	0.917

Abbreviation: IPD, idiopathic Parkinson's disease.

Note: rho: Spearman's correlation coefficient, p -value < 0.05 is considered significant.