Additional file 3 of Metal biomarker mixtures and blood pressure in the United States: cross-sectional findings from the 1999-2006 National Health and Nutrition Examination Survey (NHANES)

Additional file 3: Supplemental Fig. 3 Among non-Hispanic white adults: regression trees for estimated SBP as a function of metals biomarkers in urine and blood while adjusting age, age2, sex, BMI and smoking status. Concentrations of metal biomarkers are either ��g/dL blood (Pb only) or ��g/g creatinine (all other metals in urine).