Table 1 displays the weighted sociodemographic characteristics and some disease conditions of the four groups. Participants with better serum 25(OH)D status had an older age, a higher percentage of non-Hispanic whites, higher diploma and household earnings, and were less likely to have diabetes or be overweight (P<0.01). When comparing cardiometabolic biomarkers, participants with better serum 25(OH)D status were likely to have worse glucose, glycohemoglobin, C-reactive protein (CRP), and insulin and higher HDL-cholesterol (P < 0.01, Table 2). Here, INS is linked to diabetes mellitus.