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Differences Between Alcoholic and Nonalcoholic Patients With Wernicke Encephalopathy: A Multicenter Observational
Antonio J Chamorro1, Beatriz Rosón-Hernández2, José-A Medina-García3
1Department of Internal Medicine, Hospital Universitario de Salamanca, Salamanca, Spain.
Mayo Clinic Proceedings
|June 6, 2017
Summary
Alcoholic patients with Wernicke encephalopathy (WE) often show cerebellar signs and are diagnosed faster than nonalcoholic patients. Nonalcoholic patients may experience delayed diagnosis, but overall mortality for WE is lower than previously reported.
Area of Science:
- Neurology
- Internal Medicine
- Clinical Research
Background:
- Wernicke encephalopathy (WE) is a serious neurological condition often linked to thiamine deficiency.
- Understanding the distinct clinical presentations and outcomes between alcoholic and nonalcoholic WE is crucial for timely diagnosis and management.
- Previous studies have not fully elucidated the specific differences in characteristics and prognosis between these two patient groups.
Purpose of the Study:
- To compare the demographic, clinical characteristics, and prognostic outcomes of alcoholic versus nonalcoholic patients diagnosed with Wernicke encephalopathy.
- To identify key differences in symptom presentation, diagnostic timelines, and mortality rates between the two groups.
Main Methods:
- A retrospective observational cohort study was conducted involving 468 patients diagnosed with WE across 21 Spanish medical centers from 2000 to 2012.
- Data collected included demographic information, clinical signs (ocular, cerebellar, confusion), laboratory results, imaging findings (MRI), and patient outcomes (mortality, hospitalization duration).
- Statistical analysis was performed to compare variables between alcoholic and nonalcoholic patient cohorts.
Main Results:
- Alcoholism was the predominant risk factor (92.7%). Alcoholic patients were more likely to present with cerebellar signs (P=.01) but less likely to have ocular signs (P=.02) compared to nonalcoholics.
- Alcoholic patients showed higher rates of hyponatremia (P=.04) and decreased platelet count (P=.005).
- Diagnosis was significantly faster in alcoholic patients (median 1 day vs. 4 days; P=.001), with shorter hospitalizations (13 days vs. 23 days; P=.002).
Conclusions:
- Alcoholic patients with Wernicke encephalopathy exhibit distinct clinical features, notably a higher prevalence of cerebellar signs and a lower incidence of ocular signs compared to nonalcoholic patients.
- Nonalcoholic patients may face diagnostic delays, highlighting the need for increased awareness in non-alcohol-related WE cases.
- The overall in-hospital mortality observed in this cohort was lower than previously reported in the literature.
