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Microalbuminuria in non-insulin-dependent diabetes
C E Mogensen1, E M Damsgaard, A Frøland
1Medical Department M, Diabetes and Endocrinology, Kommunehospital, Aarhus, Denmark.
Clinical Nephrology
|January 1, 1992
Summary
Microalbuminuria, an early sign of kidney damage in diabetes, is a strong predictor of cardiovascular disease and early death. Monitoring urinary albumin excretion rate (UAER) is crucial for risk assessment in diabetic patients.
Area of Science:
- Nephrology
- Diabetology
- Cardiovascular Medicine
Background:
- Microalbuminuria, defined as urinary albumin excretion rate (UAER) of 20-200 µg/min, is a key complication in diabetes mellitus (DM).
- Diabetic nephropathy affects ~30% of IDDM patients and 5-10% of NIDDM patients, with cardiovascular disease being the primary cause of mortality in NIDDM.
- Elevated UAER is observed in ~40% of newly diagnosed NIDDM patients and 20-30% of NIDDM patients during the disease course.
Purpose of the Study:
- To investigate the significance of microalbuminuria as a marker for diabetic nephropathy and mortality.
- To explore the correlation between UAER, glycemic control, and blood pressure in diabetic patients.
- To assess the role of microalbuminuria as a risk factor for early death in the general elderly population.
Main Methods:
- Review of international consensus definitions and epidemiological data on microalbuminuria (UAER).
- Analysis of correlations between UAER, age, glycemic control, and blood pressure (BP) in diabetic and non-diabetic populations.
- Evaluation of microalbuminuria as a predictor of nephropathy and mortality in patients with known and newly detected diabetes, as well as in the elderly population.
Main Results:
- Microalbuminuria is an excellent marker for subsequent nephropathy in IDDM and a strong predictor of early death, primarily from cardiovascular disease, in both IDDM and NIDDM.
- While UAER correlates with glycemic control and BP, standard antidiabetic treatment does not always reduce high UAER values.
- Even slight microalbuminuria (15-40 mg/l) is associated with increased mortality, and it is a significant risk factor for early death in the elderly, potentially confounding established risk markers.
Conclusions:
- Microalbuminuria is a critical indicator of diabetic kidney disease and a potent predictor of premature mortality, particularly cardiovascular death.
- Early detection and management of microalbuminuria are essential for risk stratification and intervention in diabetic patients and the elderly.
- Further research is needed to elucidate the mechanisms linking microalbuminuria to cardiovascular risk and early mortality.