Abstract:
BACKGROUND:It is still unclear whether individuals with the same degree of obesity but different weight histories since young adulthood have different insulin concentration, prevalence of metabolic syndrome components and their clustering. METHODS:A cross-sectional study was conducted on 3,399 (for weight difference analysis) and 1,879 (for weight fluctuation analysis) Japanese men aged 40-59 years. Weight difference was calculated by subtracting the recalled weight at about 25 years old from the current weight. The root mean square error around the slope of weight on age (weight-RMSE) was calculated by a simple linear regression model, in which the subject's actual weights at ages 20, 25, 30, 40 years and 5 years prior to the study, as well as current weight, were dependent variables against the subject's age as the independent variable. Each metabolic syndrome component was defined as follows: serum triglycerides > or =150 mg/dL; HDL-cholesterol <40 mg/dL; fasting glucose > or =110 mg/dL; and blood pressure > or =140/90 mm Hg. RESULTS:Those who gained <10%, <20%, or 20% or more in weight had a significantly higher than unity odds ratio of having two or more metabolic syndrome components in relation to those whose weight remained stable: 1.28 (95% confidence interval: 0.95-1.73), 2.49 (1.91-3.24), and 5.30 (3.97-7.07), respectively. Weight-RMSE was significantly and positively associated with fasting insulin concentration independent of current weight, weight-slope or other lifestyle-related factors. CONCLUSIONS:Metabolic syndrome components would likely tend to cluster more in individuals with large weight gain on a physiologic basis characterized by high fasting insulin concentration. Furthermore, weight fluctuation was suggested to increase the risk of fasting hyperinsulinemia.
journal_name
J Epidemioljournal_title
Journal of epidemiologyauthors
Yatsuya Hdoi
10.2188/jea.17.141subject
Has Abstractpub_date
2007-09-01 00:00:00pages
141-6issue
5eissn
0917-5040issn
1349-9092pii
JST.JSTAGE/jea/17.141journal_volume
17pub_type
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