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 P < 0.05.