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Is microalbuminuria part of the prediabetic state? The Mexico City Diabetes Study
S M Haffner1, C Gonzales, R A Valdez
1Department of Medicine, University of Texas Health Science Center at San Antonio.
Abstract:
Microalbuminuria is associated with increased cardiovascular mortality in both diabetic and non-diabetic subjects. A number of studies have indicated that insulin resistance, increased blood pressure and dyslipidaemia precede the onset of clinical diabetes. We examined various correlates of microalbuminuria in 1,298 non-diabetic subjects who participated in the Mexico City Diabetes Study, a population-based study of diabetes and cardiovascular risk factors. Both parental history of diabetes and impaired glucose tolerance were significantly associated with microalbuminuria. These results were not explained by differences in age or blood pressure between subjects with or without a parental history of diabetes or impaired glucose tolerance. In addition, subjects with microalbuminuria had increased 2-h insulin and triglyceride concentrations, a higher prevalence of hypertension, and decreased high density lipoprotein cholesterol concentrations relative to subjects without microalbuminuria. These results that microalbuminuria may be a feature of the prediabetic state.
Insights
Microalbuminuria, a marker of kidney damage, may indicate prediabetes. This kidney function indicator is linked to cardiovascular risks and metabolic changes seen before diabetes diagnosis.
Area of Science:
- Nephrology
- Endocrinology
- Cardiovascular Medicine
Background:
- Microalbuminuria is linked to higher cardiovascular mortality in diabetic and non-diabetic individuals.
- Insulin resistance, hypertension, and dyslipidemia are recognized precursors to clinical diabetes.
- Existing research highlights the association between these metabolic factors and cardiovascular risk.
Purpose of the Study:
- To investigate the correlates of microalbuminuria in a non-diabetic population.
- To determine if microalbuminuria is associated with prediabetic states.
- To identify cardiovascular risk factors associated with microalbuminuria in the absence of diagnosed diabetes.
Main Methods:
- Analysis of 1,298 non-diabetic subjects from the population-based Mexico City Diabetes Study.
- Assessment of microalbuminuria in relation to parental history of diabetes and impaired glucose tolerance.
- Evaluation of associations with 2-hour insulin, triglyceride, HDL cholesterol levels, and hypertension prevalence.
Main Results:
- Parental history of diabetes and impaired glucose tolerance were significantly associated with microalbuminuria.
- Subjects with microalbuminuria exhibited higher 2-hour insulin and triglyceride levels.
- Hypertension prevalence was higher, and high-density lipoprotein cholesterol levels were lower in subjects with microalbuminuria.
Conclusions:
- Microalbuminuria may serve as an early indicator of the prediabetic state.
- The findings suggest microalbuminuria is associated with key metabolic abnormalities preceding diabetes.
- These results underscore the potential of microalbuminuria as a marker for cardiovascular risk in prediabetes.