The results of linear regression of protein concentrations measured using nanoflow LC-MS/MS and IS_pep vs. clinical measures for each of the proteins are shown: (A) percent HbA1c in capillary DBS, (B) percent HbA1c in EDTA-WB DBS, (C) capillary DBS apoA-I concentration (mg/dL), (D) EDTA-WB DBS apoA-I concentration (mg/dL), (E) matched plasma apoA-I concentration (mg/dL), (F) capillary DBS apoB concentration (mg/dL) and (G) EDTA-WB DBS apoB concentration (mg/dL), (H) matched plasma apoB concentration (mg/dL). Dashed lines represent the 95% confidence interval for least squares regression.