Association of Vitamin D Levels and Mortality in Overactive Bladder: Nonlinear Dose-Response and Threshold Effect.

Although the interaction tests did not reach statistical significance, the most pronounced risk reductions were observed in individuals aged < 60 years (HR: 0.50, 95% CI: 0.32–0.78; P _interaction = 0.074) and smokers (HR: 0.68, 95% CI: 0.55–0.84; P _interaction = 0.15) (Figure 2 ). 3.4.

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