PMID: 11918628Mar 29, 2002Paper

Age-related increase in haemoglobin A1c and fasting plasma glucose is accompanied by a decrease in beta cell function without change in insulin sensitivity: evidence from a cross-sectional study of hospital personnel

Diabetic Medicine : a Journal of the British Diabetic Association
A P Yates, I Laing

Abstract

To examine the influence of age on glucose homeostasis in a population of healthy, non-diabetic hospital personnel. One hundred and twenty female and 71 male non-diabetic individuals (fasting plasma glucose < 7.0 mmol/l) were fasted overnight prior to blood sampling. Glycated haemoglobin (HbA1c), fasting plasma glucose (FPG) and fasting plasma insulin (FPI) were measured using a BioRad Diamat automated HPLC, a Hitachi 747 analyser and a sensitive in-house radioimmunoassay, respectively. Mathematical modelling of the fasting glucose and insulin pairs (homeostasis model assessment (HOMA)) generated indices of pancreatic beta cell function, HOMA-B and tissue insulin sensitivity HOMA-S. Spearman rank correlation analysis showed that in the whole group there was a significant negative correlation between age and HOMA-B (rs = -0.218, P = 0.0022) and a significant positive correlation between age and both HbA1c (rs = 0.307, P = 0.0001) and FPG (rs = 0.26, P = 0.0003). There was no correlation between age and either FPI (rs = -0.08, P = 0.266) or HOMA-S (rs = 0.024, P = 0.75). Analysis by gender showed the above associations to be present in the females (rs = -0.243, P = 0.0076; rs = 0.304, P = 0.0007; rs = 0.32, P = 0.0004 for age vs....Continue Reading

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