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Research Article: Impact of coexisting obesity and malnutrition on the clinical outcomes of acute ischemic stroke patients treated with intravenous thrombolysis: a cohort-based study

Date Published: 2026-07-31

Abstract:
The simultaneous presence of obesity and malnutrition, termed the double burden of malnutrition (DBM), has become a growing public health challenge. However, little is known about how the DBM influences patients with acute ischemic stroke (AIS) who receive intravenous thrombolysis (IVT). We aimed to investigate the associations between obesity and nutritional status and clinical characteristics and clinical outcomes among AIS patients receiving IVT. We conducted a single-center, prospective cohort study at a Shanghai hospital, including AIS patients who received alteplase IVT therapy from January 2018 to December 2022. Patients were categorized into four distinct subgroups based on body mass index-based obesity and nutritional status, as assessed using the Controlling Nutritional Status score: (1) nourished non-obese; (2) malnourished non-obese; (3) nourished obese; and (4) malnourished obese. The primary endpoints of the study were poor outcomes and all-cause mortality within 3?months, while the secondary outcomes were early neurological deterioration (END) and hemorrhagic transformation (HT). The overall stroke cohort consisted of 6,892 AIS admissions, of which 366 patients receiving IVT were included in this study. The median age was 68?±?12?years, and 239 subjects (65.3%) were men. A total of 52.7% of patients were malnourished, and greater malnutrition severity independently predicted worse clinical outcomes after thrombolysis. During the follow-up period, the malnourished obese group had the highest rates of poor outcomes and END, followed by the malnourished non-obese, nourished obese, and nourished non-obese groups ( p <?0.05). After adjusting for confounding factors in a multivariate logistic regression analysis, the malnourished obese group showed significantly elevated risks of poor outcomes (odds ratio [OR], 2.850 [1.061–7.650]; p =?0.038) and END (OR, 19.158 [2.324–157.935]; p =?0.006), using the nourished non-obese group as the reference group. Malnutrition affected more than half of AIS patients undergoing IVT, including those with obesity. Patients with malnutrition were associated with worse clinical outcomes, especially those with moderate-to-severe malnutrition. Notably, patients with concurrent obesity and malnutrition exhibited the most unfavorable 3-month clinical profiles across all four subgroups.

Introduction:
The simultaneous presence of obesity and malnutrition, termed the double burden of malnutrition (DBM), has become a growing public health challenge. However, little is known about how the DBM influences patients with acute ischemic stroke (AIS) who receive intravenous thrombolysis (IVT). We aimed to investigate the associations between obesity and nutritional status and clinical characteristics and clinical outcomes among AIS patients receiving IVT.

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