The Effects of Uric Acid, Serum Vitamin D3, and Their Interaction on Parkinson’s Disease Severity

Table 2

The bivariate correlation between serum vitamin D3, UA levels, duration of disease and UPDRS, and Hoehn and Yahr scores in total sample and different age and sex groups.

	UPDRS & UA	UPDRS & serum vitamin D3	H&Y & UA	H&Y & serum vitamin D3	UPDRS & duration	H&Y & duration
Total population	0.148	0.036	0.203^*	0.023	0.123	0.190
Age
≤62	0.137	0.250	0.167	0.177	0.293^*	0.62^*
>62	0.114	−0.337^*	0.239	−0.193	0.036	0.170
Sex
Male	0.272^*	0.033	0.340^*	0.069	0.115	0.120
Female	−0.068	−0.004	−0.032	0.099	0.144	0.301

UPDRS: Unified Parkinson’s Disease Rating Scale III; UA: uric acid; H&Y: Hoehn and Yahr. The presented values are Spearman rank correlation coefficient. ^*The correlations are significant at .