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Evaluation of the American Heart Association Stroke Outcome Classification
1Department of Preventive Medicine, Center on Aging, University of Kansas Medical Center, Kansas City 66160-7313, USA. smlai@kumc.edu
Insights
The American Heart Association Stroke Outcome Classification (AHA.SOC) effectively measures stroke impairments and disabilities. Its function classification performs comparably to the Modified Rankin Scale for daily living activities.
Area of Science:
- Neurology
- Rehabilitation Medicine
- Clinical Outcomes Assessment
Background:
- Stroke outcome classification is crucial for patient management and research.
- Existing scales may have limitations in comprehensively capturing post-stroke functional status.
- The American Heart Association Stroke Outcome Classification (AHA.SOC) is a proposed tool for stroke outcome assessment.
Purpose of the Study:
- To evaluate the concurrent validity of the AHA.SOC.
- To compare the performance of AHA.SOC's function classification with the Modified Rankin Scale (MRS).
Main Methods:
- 105 stroke patients from the Kansas City Stroke Study were analyzed.
- Patients underwent standardized assessments within 14 days of stroke onset and at 1, 3, and 6 months.
- Spearman rank correlations and Kruskal-Wallis tests were used to analyze data.
Main Results:
- All three domains of the AHA.SOC showed significant associations with stroke severity and functional measures (Barthel Index, Lawton IADL, SF-36 physical function).
- Both AHA.SOC-Function and MRS demonstrated strong ability to discriminate disabilities and handicap.
- AHA.SOC-Function showed a slight advantage over MRS in assessing instrumental activities of daily living.
Conclusions:
- The AHA.SOC effectively captures impairments, disabilities, and handicap post-stroke.
- AHA.SOC-Function is comparable to MRS for basic activities of daily living and slightly superior for instrumental activities.
- Neither AHA.SOC-Function nor MRS adequately captured differences in mental health outcomes.
Background And Purpose:
The purpose of this study was to evaluate the concurrent validity of the American Heart Association Stroke Outcome Classification (AHA.SOC) and compare performance of its function classification with that of the Modified Rankin Scale.
Methods:
The individuals in this study included the last 105 consecutive subjects who were part of a cohort of 459 stroke patients in the Kansas City Stroke Study. The patients were evaluated with a variety of standardized assessments at enrollment (within 14 days of stroke onset) and followed at 1, 3, and 6 months after stroke. Specifically, we examined validity of AHA.SOC by comparing its 3 domains (ie, Domain, Severe, and Function) with stroke severity. We correlated AHA.SOC-Function with scores of the Barthel Index, Lawton Instrumental Activities of Daily Living (IADL) Scale, and Medical Outcome Study 36-Item Short-Form Health Survey (SF-36) measures of physical function and mental health. Finally, we compared the discriminant ability of AHA.SOC-Function and the Modified Rankin Scale in assessing disability and handicap. These data were analyzed with the use of Spearman rank correlations and Kruskal-Wallis tests.
Results:
All 3 domains of the AHA.SOC were significantly associated with stroke severity and scores of Barthel Index, Lawton IADL, and SF-36 physical function (all P<0.001). Both AHA.SOC-Function and the Modified Rankin Scale discriminated well the disabilities and handicap measured by Barthel Index, Lawton IADL, and SF-36 physical function (all P<0.001).
Conclusions:
The AHA.SOC was able to capture impairments, disabilities, and handicap after stroke. The AHA. SOC-Function performed equally as well as the Modified Rankin Scale in assessing disabilities related to basic activities of daily living but differentiated slightly better than the Modified Rankin Scale in assessing disabilities/handicap related to instrumental activities of daily living. Neither the AHA.SOC-Function nor the Modified Rankin Scale captured differences in mental health after stroke.