The association of malnutrition on stroke subtypes has not been well established. We investigated the relationship between malnutrition and functional outcome according to stroke subtypes.
Acute consecutive ischemic stroke patients (n = 1915, 73 ± 12 years) were analysed. The nutritional status was evaluated using the Controlling Nutritional Status (CONUT) score, which was calculated from the serum albumin level, lymphocyte count, and total cholesterol level; malnutrition was defined as a CONUT score of 5 to 12. A poor outcome was defined as a modified Rankin Scale score ≥ 3 at 3 months.
Of the 1518 patients, 113 (7.4%) had malnutrition, and 533 (33.1%) had a poor outcome. Among the patients with cardioembolic stroke and stroke of other etiologies, those with malnutrition had higher rates of poor outcomes than those without. After adjusting for age, sex, and baseline stroke severity, malnutrition was independently associated with poor outcomes in patients with cardioembolic stroke and other stroke etiologies (odds ratio 3.25, 95% confidence interval 1.02-10.4, p = .044; 6.22, 2.71-14.3, p < .001, respectively).
Considering stroke subtype, malnutrition determined using the CONUT score was independently associated with poor outcomes in the patients with cardioembolic stroke or stroke of other etiologies.

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