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. Author manuscript; available in PMC: 2016 Mar 30.
Published in final edited form as: Biodemography Soc Biol. 2015;61(3):285–297. doi: 10.1080/19485565.2015.1068105

Figure 1. Schematic of the Dried Blood Spot Biomarker Serum Equivalency and Quality Control Sub-Study.

Figure 1

This schematic depicts blood sample types for the Be Well Work Well (BWWW) Study, Sleep and Cardiovascular Disease Risk (Sleep CVD-R) Study, and blinded time control sample. All three of these control samples were processed and shipped to the DBS lab using identical procedures as used for the main study samples including use of main study blood spot cards, and mixed among the main study sample shipments. The University of Washington lab was thus maintained blind to the use of any control samples as all samples appeared identical. For the paired control samples, the serum venipuncture collection occurred within minutes of the DBS fingerstick collection. Serum samples were assayed at independent CLIA-certified labs.