Fig. 1
From: Association of cardio-renal biomarkers and mortality in the U.S.: a prospective cohort study
Flowchart of our study. Data were required from National Health and Nutrition Examination Survey (NHANES) data and NCHS mortality data with the linkage of 31,717 individuals obtained. Participants were included based on age, presence of diabetes, and availability of biomarker data, resulting in a final sample size of 1,783 individuals. Survey strata, and primary sample units were applied in our analysis procedure whenever feasible