Abstract
The relationship between parity and risk of diabetes is controversial, and little information is available regarding associations between parity and measures of insulin resistance and beta-cell function. The objective of this study was to investigate the association between parity and risk of glucose intolerance and related metabolic disorders using data from a population-based study in a Native Canadian community. Female participants (n = 383, aged 12-79 years) provided fasting blood samples for the determination of glucose, insulin, C-peptide, and proinsulin concentrations. A 75-g oral glucose tolerance test was administered, and diabetes and impaired glucose tolerance were diagnosed according to World Health Organization criteria. Waist circumference and percent body fat were determined. Information regarding occurrence of live births and previously diagnosed diabetes was obtained from interviewer-administered questionnaires. Parity was associated with a significantly reduced risk of diabetes (nulliparous vs. >or=1 birth, odds ratio 0.43, 95% CI 0.19- 0.94, P < 0.05) after adjustment for age and waist circumference. In addition, nondiabetic nulliparous women had significantly elevated concentrations of fasting insulin and pr...Continue Reading
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