Age-adjusted percent change in striatal [123I]β-CIT uptake according to overall and gender-specific quintiles of baseline serum urate. Median serum urate by quintiles (1 to 5) mg/dL: All: 3.8, 4.8, 5.5, 6.3, 7.5; Men: 4.4, 5.3, 6.0, 6.6, 7.8; Women: 3.1, 4.0, 4.5, 5.2, 6.6. * p < 0.05; ** p < 0.001 compared to corresponding quintile 1. P for linear trend: all, p= 0.002; men, p=0.0008; women, p=0.4.