[3][4] It was then modified by either van Swieten et al.[5] or perhaps Prof. C. Warlow's group at Western General Hospital in Edinburgh for use in the UK-TIA study in the late 1980s to include the value '0' for patients who had no symptoms.
[9] The multimedia mRS training system which was developed by Prof. K. Lees' group at the University of Glasgow is available online.
The mRS is frequently criticized for its subjective nature which is viewed as skewing results, but is used throughout hospital systems to assess rehabilitation needs and outpatient course.
These criticisms were addressed by researchers creating structured interviews which ask simple questions both the patient and/or the caregiver can respond to.
[1][10] More recently, several tools have been developed to more systematically determine the mRS, including the mRS-SI,[11] the RFA,[2] and the mRS-9Q.