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Older women with ESRD face higher mortality, compared with male counterparts


 

REPORTING FROM AACE 2019

– In patients with end-stage renal disease, women older than 50 years have a significantly higher mortality, compared with their male counterparts, results from an analysis of national data showed.

“The racial and ethnic disparities in the prevalence, treatment, risks, and outcomes of [hypertension] in patients with CKD [chronic kidney disease], are well recognized,” the study’s senior author, Ricardo Correa, MD, said in an interview in advance of the annual scientific and clinical congress of the American Association of Clinical Endocrinologists. “Whites have better control of blood pressure, compared with Hispanics or African Americans with CKD, for example. On the other hand, gender differences in the outcome of blood pressure control and mortality across the different CKD stages have been very poorly studied, with conflicting results.”

The importance of gender difference has been mostly the focus in cardiovascular diseases, he continued, with compelling data revealing a higher incidence in men than in women of similar age, and a menopause-associated increase in cardiovascular disease in women.

“Whether the same can be said for hypertension, remains to be elucidated,” said Dr. Correa, an endocrinologist who directs the diabetes and metabolism fellowship at the University of Arizona in Phoenix.

In what he said is the first study of its kind, Dr. Correa and his colleagues set out to determine if gender in the U.S. population and menopausal age affect the inpatient survival rate in hypertensive patients across different stages of CKD. They drew from the 2005-2012 National Inpatient Sample to identify 2,121,750 hospitalized hypertensive patients and compared a number of factors between men and women, including crude mortality and mortality per CKD stage, menopausal age, length of stay, and total hospital charges.

Of the 2,121,750 patients, 1,092,931 (52%) were men and 1,028,819 (48%) were women; their mean age was 65 years. Among women, 32% had stage 3 CKD, 15% had stage 4 disease, 3% had stage 5 CKD, and 54% had end-stage renal disease (ESRD). Among men, 33% had stage 3 CKD, 13% had stage 4 disease, 3% had stage 5 CKD, and 51% had ESRD. The researchers observed that in-hospital crude mortality was significantly higher for men, compared with a matched group of women at CKD stages 3 and 4 (3.09% vs. 3.29% for CDK 3; P less than .0001 and 4.05% vs. 4.36% for CDK 4; P = .0004), yet was nonsignificant among those with ESRD (4.68% vs. 4.83%; P = .45).

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