Autoimmune encephalitis
A costly condition
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Abstract
Objective To assess the inpatient hospitalization burden and costs of patients with autoimmune encephalitis (AE) at a tertiary care institution.
Methods Adult inpatients with AE were identified retrospectively from July 1, 2005, to June 30, 2015. Demographic and clinical data were collected and analyzed. Billing data were compared to those of patients with herpes simplex encephalitis (HSE). Charges were adjusted for inflation.
Results Of 244 admissions for encephalitis reviewed, 63 patients met criteria for probable or definite AE. Thirty-one (49%) patients were antibody positive, and 27 (43%) were admitted to the intensive care unit (ICU). Median hospital charges per patient with AE were more than $70,000; median length of stay (LOS) was 15 days; and in-hospital mortality was 6%. Patients admitted to the ICU had substantially higher median hospital charges (ICU $173,000 per admission vs non-ICU $50,000 per admission, p < 0.001). LOS was strongly associated with charges and was driven by delay in diagnosis of AE, prolonged treatment courses, and lack of response to therapy. Compared with HSE, median hospital charges per patient with AE were nearly 4 times higher, median AE LOS was 3 times higher, and total charges over the study period were nearly twice as high.
Conclusions Patients with AE used more inpatient health care resources per patient during a 10-year period than patients with HSE at our institution. ICU-admitted patients with AE were responsible for a substantially higher financial burden than non–ICU-admitted patients with AE. Our data underscore the need for the development of novel diagnostic and therapeutic modalities to improve patient outcomes and to decrease hospital burden in AE.
Glossary
- AE=
- autoimmune encephalitis;
- HSE=
- herpes simplex encephalitis;
- ICD-9-CM=
- International Classification of Diseases, 9 revision, clinical modification;
- ICU=
- intensive care unit;
- IgG=
- immunoglobulin G;
- LOS=
- length of stay;
- mRS=
- modified Rankin Scale;
- PLEX=
- plasma exchange;
- SE=
- status epilepticus
Footnotes
Go to Neurology.org/N for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.
- Received April 9, 2018.
- Accepted in final form October 22, 2018.
- © 2019 American Academy of Neurology
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Letters: Rapid online correspondence
- Autoimmune encephalitis: Cost perspective
- Khichar Shubhakaran, Professor and Head Neurology, Dr. S. N. Medical College (Jodhpur, India)
Submitted March 29, 2019
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