Wearable sensors provide early detection of progression in Parkinson’s Disease

For the first time, we have shown that it is possible to track disease progression of Parkinson's using machine learning to analyse data derived from sensor devices worn by patients.
Published in Biomedical Research
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In this study we have shown for the first time that it is possible to track the progression of Parkinson’s Disease accurately using specially trained machine learning algorithms to analyse data derived from sensor devices worn by patients.

The novel methods described in this work, can be used by clinicians alongside the more traditional clinical rating scales to not only improve the accuracy of diagnosis, but also track progression of Parkinson’s Disease more closely. Being able to precisely monitor the progression of motor symptoms in people with neurological disorders such as Parkinson’s disease is important for two main reasons: clinicians need to be confident in their assessment of how the disease is progressing in individual patients, and researchers running clinical trials need to be able to measure how well therapeutic interventions are working.

At the moment, clinicians use rating scales (scoring systems based on a physical examination) to assess the key symptoms of people with Parkinson’s disease. One problem with this is that there is an element of subjectivity in the assessment and different clinicians may not provide identical scores. Another issue is that the scales are not evenly spaced – the difference between scores of 30 and 40 may not be the same as the difference between 40 and 50 for example. This means that the detection of disease progression could be delayed, and in clinical trials, the types of statistical analysis that can be performed on the data might be restricted.

With my team, the NeuroMetrology Lab, we have been carrying out experiments to assess whether sensor devices worn by patients on their trunk, wrists, and feet, combined with machine learning, can track the progression of motor symptoms more accurately than traditional rating scales. This work is part of the longitudinal study OxQuip, Oxford  QUantification In Parkinsonism Study, that I lead here at the University of Oxford.

We and other groups have previously demonstrated that the analysis of data from wearable devices using machine learning algorithms can help with accurate diagnosis. It is already known that these new techniques can be used to discriminate between healthy older adults, individuals with different severity of Parkinson’s disease, and individuals with other Parkinsonian-like disorders.

Caption

In this new study, we asked whether it was possible to use the data collected during walking and standing tasks not only to diagnose but also to track the progression of motor symptoms in Parkinson’s Disease over time. The study participants were assessed intensively with visits to the clinic every 3 months, in order that the team could determine the shortest time over which their analysis could detect disease progression.  We found that progression could be detected in as little as 15 months with our technique.

This is an important development for clinical trials.  Bringing a new drug for a disease like Parkinson’s from early development to clinical use takes years and consumes vast resources, and many drugs that look promising in the lab turn out not to work in patients. It is critical to be able to pick out the ones that are effective as early as possible, so work on them may be accelerated. I hope this will be made easier with these new objective measuring tools.

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