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Journal of Neurology

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01-04-2021 | Multiple Sclerosis | Original Communication

Digital biomarkers can highlight subtle clinical differences in radiologically isolated syndrome compared to healthy controls

Authors: Mikael Cohen, Lydiane Mondot, Salim Fakir, Cassandre Landes, Christine Lebrun

Published in: Journal of Neurology | Issue 4/2021

Abstract

Objective

To explore the use of digital biomarkers to distinguish healthy controls (HC) from subjects with a radiologically isolated syndrome (RIS).

Methods

We developed a smartphone application called MS Screen Test (MSST) to explore several dimensions of the neurological exam such as finger tapping speed, agility, hand synchronization, low contrast vision and cognition during a short evaluation. This app was tested on a cohort of healthy volunteers including a subset of subjects who underwent two evaluations on the same day to assess reproducibility. In a second step, the app was tested on a cohort of RIS subjects. Performances of RIS subjects were compared with age and genre-matched HC.

Results

HC underwent two consecutive evaluations on MSST. The analysis showed good reproducibility for all measures. Then 21 RIS subjects were compared to 32 matched HC. Compared to HC, we found that RIS subjects had a lower finger tapping speed on the dominant hand (5.6 versus 6.5 taps per second; p = 0.005), a longer inter hand interval during the hand synchronization task (14.4 versus 11.3 ms; p = 0.03) and significantly poorer scores on the low contrast vision and cognition tests.

Conclusion

MSST only requires a smartphone to obtain digital biomarkers relative to several dimensions of the neurological examination. Our results highlighted subtle differences between HC and RIS subjects. We plan to evaluate this tool in MS patients, which will allow us to get a much larger sample of subjects, to determine whether digital biomarkers can predict disease course.

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Title: Digital biomarkers can highlight subtle clinical differences in radiologically isolated syndrome compared to healthy controls
Authors: Mikael Cohen
Lydiane Mondot
Salim Fakir
Cassandre Landes
Christine Lebrun
Publication date: 01-04-2021
Publisher: Springer Berlin Heidelberg
Keywords: Multiple Sclerosis
Biomarkers
Published in: Journal of Neurology / Issue 4/2021
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI: https://doi.org/10.1007/s00415-020-10276-w

At a glance: The STEP trials

Springer Medicine

Digital biomarkers can highlight subtle clinical differences in radiologically isolated syndrome compared to healthy controls

Abstract

Objective

Methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Objective

Methods

Results

Conclusion

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