Does Sodium Intake Affect Mortality and CV Event Risk?
Sodium intake may not be associated with mortality or incident cardiovascular events in older adults, according to a study published Jan. 19 in the JAMA: Internal Medicine.
In the Health, Aging and Body Composition (Health ABC) Study, initiated in 1997, researchers assessed self-reported sodium intake from 2,642 Medicare beneficiaries, ages 71-80 years old. Participants were excluded for difficulties with walking or activities of daily life, cognitive impairment, inability to communicate, and previous heart failure (HF). At the first annual follow-up visit, researchers recorded food intake as reported by participants, specifically examining sodium intake. After 10 years, 34 percent of patients had died, while 29 percent and 15 percent had developed cardiovascular disease and HF, respectively.
The results of the study showed that there was no association between participant-reported sodium intake and 10-year mortality, incident HF or incident cardiovascular disease. Further, there was no indication that consuming less than 1,500 mg/d of sodium benefitted participants any more than consuming the recommended amount (1,500-2,300 mg/d). However, the study showed a slight potential for harm when participants had a sodium intake of greater than 2,300 mg/d, especially in women and African Americans.
The authors note that while the food frequency questionnaire used by participants at the first annual follow-up has limitations in its accuracy, “self-reported adoption of a low-salt diet was not associated with significantly higher risk for [any] events.” They conclude that moving forward, there is a need for further research and stronger evidence in order to create better recommendations for older adults.
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