Fig. 4From: Selenium, copper, zinc and hypertension: an analysis of the National Health and Nutrition Examination Survey (2011–2016)Estimated parameter levels with 95% CI by quantile levels (Q1–4) of serum selenium and its effects on incremental age and total serum cholesterol (Q1 = < 115.9 μg/L, Q2 = 116–126.1 μg/L, Q3 = 126.2–137.2 μg/L, Q4 = 137.3- < 299.1 μg/L)Back to article page