showed a trendp = 0.06
The ENGENE-PSP study, the largest case-control study of PSP, assigned chemical exposure showed a trend of increased odds (OR = 1.20; 95% CI = 0.99–1.45; p = 0.06), and assigned metal exposure had a trend of increased odds (OR = 1.30; 95% CI = 1.00–1.70; p = 0.05) in the univariate analysis.