Higher body mass index (BMI) is associated with lower mortality in stroke patients — a phenomenon sometimes called the "obesity paradox," new research suggests.

Investigators drew on data from over 1000 patients with an average age of 71 years who had experienced an acute ischemic stroke (AIS). All were enrolled in the multicenter National Institutes of Health (NIH) Field Administration of Stroke Therapy – Magnesium (FAST-MAG) trial, a randomized study of prehospital magnesium therapy in stroke patients, reported in 2015 in the New England Journal of Medicine.

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