Abstract
To the Editor: We read with interest the report by Fearon et al1 in this issue of Stroke on the validity of prestroke modified Rankin Scale (mRS) assessments. In summary, the investigators found limited interobserver reliability and validity of prestroke mRS assessments. This might have been expected, considering the original intent of the mRS.2,3 The mRS was designed and validated to measure global clinical function after stroke. The mRS is an ordinal scale with broadly defined grades from 0 (no residual symptoms from stroke) to 5 (bedridden) and 6 for death. Although grades 3 to 5 can be scored in people who are dependent regardless of a prior stroke, grades 0 to 2 require a comparison of stroke …
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