The change of BMI during follow-up showed marginally significant U-shaped association with dietary copper intake and the change of waist showed significant U-shaped association with copper ( P < 0.001 for both BMI change and waist change) (P for non-linearity = 0.06 for BMI change, <0.001 for waist change) ( Supplementary Figure 4 ).
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Associations between dietary copper intake, general obesity and abdominal obesity risk: A nationwide cohort study in China.
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