FIGURE 1.

Serum lipid and lipoprotein concentrations by serum selenium concentrations, Third National Health and Nutrition Examination Survey. Dose-response lines are based on restricted cubic spline transformations with 4 knots. Results were adjusted for education, family income, postmenopausal status for women, cigarette smoking, serum cotinine, alcohol consumption, physical activity, body mass index, cholesterol-lowering medication use, vitamin-mineral supplement use, glomerular filtration rate, C-reactive protein, diabetes mellitus, thyroid-stimulating hormone, and thyroxine.