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Title: Normal Range of Albumin Too Low to Predict Hypertension
URL: http://www.pslgroup.com/dg/22439A.htm
Doctor's Guide
June 25, 2008


WASHINGTON, DC -- June 25, 2008 -- Healthy individuals with higher levels of albumin excretion, even levels considered normal, are at increased risk of developing hypertension, according to a study appearing online now and in the October 2008 print issue of the Journal of the American Society of Nephrology. The study suggests that to prevent cardiovascular disease, the definition of "normal" urinary albumin excretion should be reconsidered.

Because less research has been done in low-risk populations, it unclear whether higher, although normal, levels of albumin in the urine might indicate that generally healthy individuals are at risk of developing cardiovascular disease.

To clarify the issue, John Forman, MD, Brigham and Women's Hospital, Boston, Massachusetts, and his colleagues looked at the new development of hypertension among 2,179 women without baseline hypertension or diabetes, and with normal levels of urine albumin, who were enrolled in the Nurses' Health Studies, which are among the largest and longest running investigations of factors that influence women's health. The researchers discovered that higher levels of urinary albumin excretion, even within the range considered normal, increased an individual's risk of developing hypertension. Among older women, those with the highest levels of albumin excretion were 76% more likely to develop hypertension than those with the lowest levels. For younger women, the risk was 35% higher. These elevated risks held true when factors such body mass index, blood pressure, smoking, and family history of hypertension were taken into account.

The authors concluded that their results, in conjunction with the findings of various other studies, suggest that "it is time to re-evaluate our current concept of 'normal' albumin excretion." Hypertension monitoring and treatment of individuals with higher urine albumin levels, even which are within the currently defined normal range, may be warranted.

SOURCE: Journal of the American Society of Nephrology

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