The women attended hospital between 8:00 and 10:00
am after overnight fast. A blood sample was obtained for biochemical determinations and DNA extraction. On the same visit anthropometric characteristics were recorded and blood pressure was taken after sitting for at least 5 minutes.
Blood pressure was measured with an Omron
M6 (HEM-7001-E) oscillometric blood pressure monitor (Omron Healthcare, Kyoto, Japan). Body mass index (BMI) was calculated as weight (kg) divided by height squared (m
2).
The serum was separated and freshly used for most biochemical determinations, and kept frozen at −80°C for tests not performed on the same day. Insulin levels were measured with electrochemiluminescence immunoassay (ECLIA,
Elecsys Insulin kit, Roche Cobas, Mannheim, Germany) in a Modular Analytics E170 analyzer. Levels of glucose, total calcium and phosphate, total alkaline phosphatase (ALP), triglycerides (TG), total cholesterol (TC), and high-density lipoprotein cholesterol (HDL) were measured using a spectrophotometer (Olympus 5400, Olympus, Melville, NY, USA).
Low-density lipoprotein cholesterol (LDL; mg/dl)) was calculated as TC − (HDL+TG/5),
[29] (
link) and the HOMA
IR (homeostasis model assessment) insulin resistance index was estimated as fasting serum insulin in μIU/ml × (fasting serum glucose in mg/dl × 0.05551)/22.5.
[30] (
link)
Pertusa C., Tarín J.J., Cano A, & García-Pérez M.A. (2020). Association of a single nucleotide polymorphism of RANK gene with blood pressure in Spanish women. Medicine, 99(40), e22436.