Abstract
OBJECTIVE: To examine whether fasting insulin concentrations and markers of first-phase insulin secretion are associated with weight gain and changes in distribution of adiposity over 4.4 y.
DESIGN: Longitudinal prospective population-based cohort study of middle-aged Caucasians.
SUBJECTS: 767 subjects (40–65 y at baseline) were followed up for a mean of 4.4 y.
MEASUREMENTS: 75 g oral glucose tolerance test performed at baseline and follow-up. Insulin was measured at fasting, and 30 and 120 min post-glucose load using a highly specific assay.
RESULTS: Fasting insulin levels were correlated with baseline weight (r=0.32, P<0.001), as was the 30 min insulin incremental response (r=0.17, P<0.001). Mean weight gain over the 4.4 y of follow-up was 2.17 kg (range:−6.17–10.5 kg) for men and 2.49 kg (range:−7.41–12.39 kg) for women. In women, the 30 min insulin incremental response was negatively associated with percentage weight gain (P<0.001), but there was no relationship between fasting insulin levels and weight gain. The baseline fasting insulin was positively correlated with percentage increase in waist–hip ratio (r=0.12, P=0.01). In stratified analysis, this relationship was confined to women over the age of 50 y. However, in men, none of these relationships were demonstrable.
CONCLUSION: In middle-aged women reduced first-phase insulin secretion was associated with an increased risk of future weight gain, whereas fasting hyperinsulinaemia was associated with an increase in waist–hip ratio over time.
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Gould, A., Williams, D., Byrne, C. et al. Prospective cohort study of the relationship of markers of insulin resistance and secretion with weight gain and changes in regional adiposity. Int J Obes 23, 1256–1261 (1999). https://doi.org/10.1038/sj.ijo.0801060
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DOI: https://doi.org/10.1038/sj.ijo.0801060
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