Hyponatremia in elderly patients is associated with large-bone fractures, researchers have concluded.

During an 18-month period, investigators at Lenox Hill Hospital in New York evaluated serum sodium levels in 728 patients aged 65 years and older: 364 with large-bone fractures and 364 without fractures.

The incidence of hyponatremia was 9.1% in the fracture patients and 4.1% in the nonfracture patients, according to a report in International Urology and Nephrology (2009; published online ahead of print).

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