APPENDIX TABLE 1. Collection and assay methods used in the United States and Japan.
United States | Japan | |||||
---|---|---|---|---|---|---|
Biomarker | Measure | Method | Calibration | Measure | Method | Calibration |
Systolic blood pressure | Physical exam | Average of 3 sets of blood pressure measurements | Physical exam | Average of 2 sets of blood pressure measurements | ||
Diastolic blood pressure | Physical exam | Average of 3 sets of blood pressure measurements | Physical exam | Average of 2 sets of blood pressure measurements | ||
Total cholesterol | Blood serum | Hitachi 704/717/912 Analyzer (Roche Diagnostics) | Frozen serum calibration pools (Soloman Park Laboratories, Kirkland, WA) | Blood serum | Hitachi 7170 | Seiken Liquid Abnormal |
HDL cholesterol* | Blood serum | Hitachi 704/717/912 Analyzer (Roche Diagnostics) | Frozen serum calibration pools (Soloman Park Laboratories, Kirkland, WA) | Blood serum | Hitachi 7170 | Cholestest®N Calibrator (Sekisui Medical Co. Ltd.) |
Fasting triglycerides | Blood serum | Hitachi 704/717/912 Analyzer (Roche Diagnostics) | Calibration sera (Precical, cat no 620213) | Blood serum | Hitachi 7170 | Multi cariblator lipid |
Body mass index | Physical exam | Exam weight, standard anthropometry | Physical exam | Exam weight, standard anthropometry | ||
Glycosylated hemoglobin | Whole blood | Primus Automated HPLC System/ Tosoh Alc 2.2 Plus Glycohemoglobin Analyzer | Primus high performance liquid chromatography (HPLC) | Whole blood | BM 9030 (JEOL Ltd) | RAPIDIA® Auto HbAlc (Sekisui Medical Co. Ltd.) |
Albumin | Blood serum | Beckman Synchron LX20 | Synchron Protein Calibrators (Part #450202) | Blood serum | Hitachi 7170 | Protein Standard |
Change in assay methods since 2001 was adjusted by correcting HDL in 2001–02 and 2005–06 using the Solomon Lab quality controls: Corrected HDL = [(Solomon Park assigned HDL value) × (Participant HDL)] /(Quality Control HDL value associated with participant sample) HDL = high density lipoprotein