Thirty years following the development of the first radioimmunoassay f
or albumin, microalbuminuria is widely acknowledged as an important pr
edictor of overt nephropathy in patients with Type 1 diabetes and of c
ardiovascular mortality in Type 2 diabetes. In addition, there is accu
mulating evidence to suggest that diabetic patients with microalbuminu
ria may have more advanced retinopathy, higher blood pressure, and wor
se dyslipidaemia than patients with normal albumin excretion rates. Re
cent studies have focused on the role of intervention, principally wit
h antihypertensive therapy and intensive glycaemic control, in reducin
g microalbuminuria. While successful in reducing urinary albumin excre
tion it remains to be established whether such therapies will be trans
lated into a reduction in renal failure and decreased cardiovascular m
obidity and mortality.