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KMID : 0311120210620070600
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Yonsei Medical Journal
2021 Volume.62 No. 7 p.600 ~ p.607
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Association between Plasma Osmolality and Case Fatality within 1 Year after Severe Acute Ischemic Stroke
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Liu Meng
Deng Yilun
Cheng Yajun
Hao Zilong
Wu Simiao
Liu Ming
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Abstract
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Purpose: Plasma osmolality, a marker of dehydration, is associated with cardiovascular mortality. We aimed to investigate whether elevated plasma osmolality is associated with case fatality within 1 year after severe acute ischemic stroke.
Materials and Methods: We included severe ischemic stroke patients (defined as National Institutes of Health Stroke Scale ≥15 score) within 24 hours from symptom onset admitted to the Department of Neurology, West China Hospital between January 2017 and June 2019. Admission plasma osmolality was calculated using the equation 1.86*(sodium+potassium)+1.15*glucose+urea+14. Elevated plasma osmolality was defined as plasma osmolality >296 mOsm/kg, indicating a state of dehydration. Study outcomes included 3-month and 1-year case fatalities. Multivariable logistic regression was performed to determine independent associations between plasma osmolality and case fatalities at different time points.
Results: A total of 265 patients with severe acute ischemic stroke were included. The mean age was 71.2±13.1 years, with 51.3% being males. Among the included patients, case fatalities were recorded for 31.7% (84/265) at 3 months and 39.6% (105/265) at 1 year. Elevated plasma osmolality (dehydration) was associated with 3-month case fatality [odds ratio (OR) 1.98, 95% confidence interval (CI) 1.07?3.66, p=0.029], but not 1-year case fatality (OR 1.51, 95% CI 0.84?2.72, p=0.165), after full adjustment for confounding factors.
Conclusion: Elevated plasma osmolality was independently associated with 3-month case fatality, but not 1-year case fatality, for severe acute ischemic stroke.
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KEYWORD
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Plasma osmolality, dehydration, severe acute ischemic stroke, case fatality
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