title: Characteristics of the insulin resistance syndrome in a Japanese population. The Jichi Medical School Cohort Study.
abstract: We investigated the relationships between hyperinsulinemia (a major indicator of the insulin resistance syndrome), blood pressure, dyslipidemia, and coagulation factors in 2606 community-dwelling Japanese individuals as part of the Jichi Medical School Cohort Study. An age-related decrease of the fasting insulin level was found in men but not in women. Body mass index, systolic and diastolic blood pressure, triglyceride and fasting glucose levels, and factor VII activity all increased in both sexes as the insulin level became higher, while the HDL cholesterol level decreased. In addition, total cholesterol and LDL cholesterol levels increased as the insulin level became higher and lipoprotein(a) levels decreased in the men. Fibrinogen levels were not related to the insulin level in either sex. Multiple logistic regression analysis revealed that fasting insulin levels were positively correlated with body mass index and fasting glucose and factor VII activity levels, whereas they were negatively correlated with HDL cholesterol in both sexes. In addition, fasting insulin levels were positively correlated with LDL cholesterol levels in men and with triglyceride levels in women. Our results indicate that hyperinsulinemia is associated with high factor VII activity in a general Japanese population as well as with high blood pressure and dyslipidemia. The accumulation of these cardiovascular risk factors in hyperinsulinemic subjects appears to contribute to cardiovascular events in the Japanese as well as in westerners.
authors.affiliation: Department of Internal Medicine, Awaji-Hokudan Public Clinic, Hyogo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kario
authors.forename: N
authors.initials: N
authors.lastname: Nago
authors.forename: K
authors.initials: K
authors.lastname: Kayaba
authors.forename: T
authors.initials: T
authors.lastname: Saegusa
authors.forename: H
authors.initials: H
authors.lastname: Matsuo
authors.forename: T
authors.initials: T
authors.lastname: Goto
authors.forename: A
authors.initials: A
authors.lastname: Tsutsumi
authors.forename: S
authors.initials: S
authors.lastname: Ishikawa
authors.forename: T
authors.initials: T
authors.lastname: Kuroda
authors.forename: T
authors.initials: T
authors.lastname: Miyamoto
authors.forename: T
authors.initials: T
authors.lastname: Matsuo
authors.forename: K
authors.initials: K
authors.lastname: Shimada
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000097:blood; D001794:Blood Pressure; D015992:Body Mass Index; D002318:Cardiovascular Diseases; D015331:Cohort Studies; D005167:Factor VII / Q000032:analysis; D005260:Female; D006801:Humans; D007328:Insulin / Q000097:blood; D007333:Insulin Resistance; D007564:Japan; D008055:Lipids / Q000097:blood; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D017678:Sex Distribution; D013577:Syndrome
chemical_list: D007328:Insulin; D008055:Lipids; D005167:Factor VII