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Comparison of 90‐day case‐fatality after ischemic stroke between two different stroke outcome registries using propensity score matching analysis
Author(s) -
Yu KH.,
Hong KS.,
Lee BC.,
Oh MS.,
Cho YJ.,
Koo JS.,
Park JM.,
Bae HJ.,
Han MK.,
Ju YS.,
Kang DW.,
Appelros P.,
Norrving B.,
Terent A.
Publication year - 2011
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.2010.01406.x
Subject(s) - propensity score matching , medicine , stroke (engine) , case fatality rate , ischemic stroke , matching (statistics) , ethnic group , physical therapy , demography , epidemiology , ischemia , mechanical engineering , pathology , sociology , anthropology , engineering
Yu K‐H, Hong K‐S, Lee B‐C, Oh M‐S, Cho Y‐J, Koo J‐S, Park J‐M, Bae H‐J, Han M‐K, Ju Y‐S, Kang D‐W, Appelros P, Norrving B, Terent A. Comparison of 90‐day case‐fatality after ischemic stroke between two different stroke outcome registries using propensity score matching analysis.
Acta Neurol Scand: 2011: 123: 325–331.
© 2010 John Wiley & Sons A/S. Background – It has not been clarified whether the disparity in ischemic stroke outcome between populations is caused by ethnic and geographic differences or by variations in case mix. Propensity score matching (PSM) analysis can overcome some analytical problems but is rarely used in stroke outcome research. This study was to compare the ischemic stroke case‐fatality between two PSM cohorts of Sweden and Korea. Methods – Prognostic variables related to baseline characteristics and stroke care were included in our PSM model. Then, we selected 7675 Swedish and 1220 Korean patients with ischemic stroke from each stroke registers and performed one‐to‐one matching based on propensity scores of each patient. Results – After PSM, all measured variables were well balanced in 1163 matched subjects, and the 90‐day case‐fatality was identical 6.2% (HR 0.997, 95%CI 0.905–1.099) in Sweden and Korea. Conclusions – No difference is found in the 90‐day case‐fatality in propensity score‐matched Swedish and Korean patients with ischemic stroke.