Fig. 1

Restricted cubic spline representing the association between total zinc intake and risk of type 2 diabetes in the Malmö Diet and Cancer Study (n = 26,132). Median total zinc intake (11.4 mg/day) was used as the reference point. Bold line represents hazard ratio (HR), and dotted lines represent the 95% confidence interval. The spline was fitted using a BMI-stratified Cox proportional hazards model with attained age as the time metric and adjusting for dietary and non-dietary confounders