الفهرس 
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Abstract
Normal urinary protein excretion is up to 150 mg/day. Microalbuminuria refers to the excretion of a very small amount of proteins, primarily composed of albumin that could not be detected by routine methods, i.e., dip stick method . According to the American Diabetes Association, microalbuminuria is defined as urinary albumin excretion (UAE) of 30–299 mg/ 24 hrs albumin/creatinine ratio of 30–299 g/mg creatinine. (Somaya et al,2012).
Microalbuminuria is an important early sign of diabetic nephropathy, also occurs frequently in non-diabetic subjects and is associated with several risk factors, such as hypertension, hyper-lipidemia, obesity and older age (Pinto-Sietsma et al., 2000).
Albumin excretion and microalbuminuria are currently drawing a great deal of attention in the medical literature, much of this attention derives from the fact that albumin excretion may be a reflection of generalized endothelial dysfunction in capillaries (e.g., glomeruli) and arteries (Sthouwer et al., 1998).
Screening of microalbuminuria may be excellent tool, either alone or in combination with screening for hypertension and hyper-cholesterolemia to identify subjects at risk for progressive renal failure (De Jong et al., 2003).