Three-month modified Rankin Scale as a determinant of 5-year cumulative costs after ischemic stroke
An analysis of 11,136 patients in Korea
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Abstract
Objective Stroke is a devastating and costly disease; however, there is a paucity of information on long-term costs and on how they differ according to 3-month modified Rankin scale (mRS) score, which is a primary outcome variable in acute stroke intervention trials.
Methods We analyzed a prospective multicenter stroke registry (Clinical Research Collaboration for Stroke in Korea) database through linkage with claims data from the National Health Insurance Service with follow-up to December 2016. Healthcare expenditures were converted into daily cost individually, and annual and cumulative costs up to 5 years were estimated and compared according to the 3-month mRS score.
Results Between January 2011 and November 2013, 11,136 patients were enrolled in the study. The mean age was 68 years, and 58% were men. The median follow-up period was 3.9 years (range 0–5 years). Mean cumulative cost over 5 years was $117,576 (US dollars [USD]); the cost in the first year after stroke was the highest ($38,152 USD), which increased markedly from the cost a year before stroke ($8,718 USD). The mean 5-year cumulative costs differed significantly according to the 3-month mRS score (p < 0.001); the costs for a 3-month mRS score of 0 or 5 were $53,578 and $257,486 USD, respectively. Three-month mRS score was an independent determinant of long-term costs after stroke.
Conclusions We show that 3-month mRS score plays an important role in the prediction of long-term costs after stroke. Such estimates relating to 3-month mRS categories may be valuable when undertaking health economic evaluations related to stroke care.
Glossary
- AIS=
- acute ischemic stroke;
- ANOVA=
- analysis of variance;
- CCI=
- Charlson Comorbidity Index;
- CRCS-K=
- Clinical Research Collaboration for Stroke in Korea;
- IQR=
- interquartile range;
- IST-3=
- Third International Stroke Trial;
- mRS=
- modified Rankin Scale;
- NHIS=
- National Health Insurance Service;
- NIHSS=
- National Institutes of Health;
- PERFECT Stroke=
- Performance, Effectiveness, and Costs of Treatment Episodes in Stroke;
- TOAST=
- Trial of Org 10172 in Acute Stroke Treatment;
- USD=
- US dollars
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.
Coinvestigators are listed at links.lww.com/WNL/B49.
Editorial, page 377
- Received March 22, 2019.
- Accepted in final form September 24, 2019.
- © 2020 American Academy of Neurology
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Letters: Rapid online correspondence
- Author response: Three-month modified Rankin Scale as a determinant of 5-year cumulative costs after ischemic stroke: An analysis of 11,136 patients in Korea
- Seong-Eun Kim, Biostatistician, Seoul National University Bundang Hospital
- Juneyoun Lee, Biostatistician, Korea University College of Medicine
- Philip B. Gorelick, Neurologist, Northwestern University Feinberg School of Medicine
- Hee-Joon Bae, Neurologist, Seoul National University Bundang Hospital
Submitted February 25, 2020 - Reader response: Three-month modified Rankin Scale as a determinant of 5-year cumulative costs after ischemic stroke: An analysis of 11,136 patients in Korea
- Aravind Ganesh, (1) Neurology Resident, (2) Associate Fellow, (1) Dept of Clinical Neurosciences, University of Calgary, (2) Centre for Prevention of Stroke & Dementia, University of Oxford
- Malavika Varma, Clinical Director, Advanced Health Analytics (AHA Health Ltd) (Calgary, Canada)
Submitted February 15, 2020
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