Charcot Marie Tooth Disease Clinical Trial
Official title:
Disability Severity Scale (DSI) and Hereditary Motor and Sensory Neuropathy Overall Disability Scale (HMSN-R-ODS)
The purpose of this research study is to create and validate two patient reported outcome (PRO) questionnaires. PRO questionnaires ask questions that help to measure disability in patients with inherited neuropathies. These questionnaires ask questions about what participants think disability is for themselves or others with inherited neuropathies. These questionnaires are a useful tool when evaluating whether treatments are working in the day to day life of an individual, although there are currently no questionnaires available specifically for people who have Charcot Marie Tooth disease (CMT).
Charcot Marie Tooth Disease (CMT) is a group of disorders that cause a peripheral neuropathy,
impairing the long nerves that go to the feet and hands. Due to the problems with the
peripheral nerves, people with CMT have muscle weakness and sensory loss that impairs their
physical abilities. CMT affects approximately 1 in 2500 people and is caused my mutations in
over 70 different genes. Models exist for many sub-types of CMT that have led to an increased
understanding of the biological basis for these disorders. These advances have also made
rational therapies for CMT a realistic possibility. However, clinical trials have been
limited in CMT by a combination of lack of natural history data for many subtypes, a lack of
outcome measures that can detect change in a short period for slowly progressive forms of
CMT, and a lack of outcome measures for young children with CMT.
In order to develop treatments based on the biological advances in the inherited
neuropathies, it is necessary to have measured the natural history of the various disorders.
It is only by knowing the natural history that one understands the onset of clinical
symptoms, the rate of progression, and the ultimate prognosis of these diseases. For these
reasons, the INC has dedicated much of its effort to develop sensitive outcome instruments,
including PRO tools, to measure the natural history of CMT. It is the investigators goal to
establish such an instrument for overall impairment for use in both natural history analysis
and clinical trials. To develop and validate this instrument, the investigators will be
asking people who have CMT to complete two questionnaires, the DSI and the HMSN-R-ODS. These
relate to overall symptom impairment due to CMT. These instruments may be used to help us
understand the overall progression of CMT and will ultimately help with clinical trials when
they are available for the various forms of CMT.
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