It includes 15 items related to bed mobility, transfers, walking, stair use, and running. The RMI is a unidimensional mobility scale meaning that it has minimal cognitive demands, that is, subjects are not required to interpret, remember, or understand complex or multiple instructions. The more challenging RMI items are more difficult because they require greater physical abilities, while cognitive and social capacity has little impact on performance. Since the RMI is unidimensional, it does not measure community mobility or the community integration aspect of mobility. The hierarchical nature of the RMI means that the
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RMI Description The Rivermead Mobility Index RMI is a standardized assessment of mobility originally designed for persons with either head injury or stroke but has subsequently been validated in other populations as well.
Currently there are 2 versions available. The first is the original item RMI, derived from the Rivermead Motor Assessment, which comprises 14 self-reported items and 1 direct observation item.
Each item is scored as either 0, unable to perform or 1, able to perform. A maximum score of 15 points is possible with higher scores indicative of better mobility. This is done by using an extended 6-point scoring system as well as a reduction on the number of items from 15 to only 8 that are stroke specific and include 1 turning over, 2 lying to sitting, 3 sitting balance, 4 sitting to standing, 5 standing, 6 transfers, 7 walking indoors, and 8 stairs.
The m-RMI is scored as follows: 0 unable to perform, 1 assistance of 2 people, 2 assistance of 1 person, 3 requires supervision or verbal instruction, 4 requires an aid or an appliance, and 5 independent. A maximum score of 40 is possible with higher scores indicative of increased mobility. Both assessments take less than 15 minutes to complete. The highest level of agreement was for standing and the lowest level was for walking indoors.
Advantages The two versions of the RMI are simple and quick assessments that target mobility items that are relevant to the clinician. Tentative research results support the use of both versions in practice as reliable and valid assessment tools. The Rivermead batteries only require a minimum of training to administer.
Disadvantages There is a limited amount of peer reviewed evidence pertaining to the m-RMI. Also, the suppression of 7 items in comparison to the original item tool could potentially have an impact on its content validity i. A study by Hsueh et al. Indicating that it may not be able to adequately characterize patient mobility in the early stages following a CVA, a problem not found in the m-RMI during the same study.
The maximum score for the m-RMI is The original item scale is composed of both observation and activities, employs only a 2-response scoring system 0 or 1 , and has a maximum score of Higher scores are indicative of better mobility for both scales.
Modified Rivermead Mobility Index
Rivermead Mobility Index (RMI)
The modified rivermead mobility index: validity and reliability.