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Transcript of spiral.imperial.ac.uk · Web viewMost studies in MS (75%) have used activity counts from a model...
E-health and multiple sclerosis
Paul M Matthews1, Valerie J Block2, Letizia Leocani3
1 Department of Brain Sciences and UK Dementia Research Institute Centre, Imperial College, London, UK2Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, USA [email protected] Vita-Salute San Raffaele, Milan; Neurorehabilitation Dep.t and Experimental Neurophysiology Unit, INSPE, Scientific Institute Hospital San Raffaele, Milan, Italy [email protected]
Address for correspondence:Prof. Paul M. Matthews
E515, Department of Brain SciencesImperial College LondonHammersmith HospitalDuCane Road, London WC12 0NNTel: 0044 207 594 2612
Abstract word count: 203Main text word count: 2146Bullet points word count: 124
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Abstract
Purpose of review: To outline recent applications of e-health data and digital tools for improving
the care and management of healthcare for people with multiple sclerosis (MS)
Recent findings: The digitisation of most clinical data, along with developments in communication
technologies, miniaturisation of sensors and computational advances are enabling aggregation
and clinically meaningful analyses of real-world data from patient registries, digital patient-reported
outcomes and electronic health records (EHR). These data are allowing more confident
descriptions of prognoses for MS patients and the long-term relative benefits and safety of disease
modifying treatments (DMT). Registries allow detailed, MS-specific data to be shared between
clinicals more easily and providing the additional data needed to better the impact of DMT and,
with EHR, interactions between MS and other diseases. Wearable sensors provide continuous,
long-term measures of performance dynamics in the home. In conjunction with telemedicine and
online apps, they promise a major expansion of the scope for patients to manage aspects of their
own care. Advances in disease understanding, decision support and self-management using
these Big Data are being accelerated by machine learning and artificial intelligence.
Summary: Both health professionals and patients can employ e-health approaches and tools for
development of a more patient-centred learning health system.
Keywords: e-health, registries, real-world date, wearable sensors, artificial intelligence (AI)
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Key points:
E-health refers to the use of electronic communication tools and computers by patients to
monitor or maintain their own health and by doctors to provide better care.
Patient registries provide real-world data to supplement that from clinical trials for better
understanding prognoses, the influence of co-morbidities and long-term benefits and safety
of disease modifying therapies.
Hospital or care system electronic health records complement registries with often more
comprehensive and representiative of data concerning the health of MS patients.
Wearable sensors are adding the potential for continuous, long-term measures of
performance and behaviour in the home environment.
Emerging themes concern responsible linkage of these data and use of machine learning,
artificial intelligence and modelling methods for personalisation of decision-support and
management approaches based on them.
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IntroductionMedicine relies on close observation of patients to inform future practice. Advances in electronics
for miniaturisation and dramatic reductions in power demands have enabled a rapid growth in
computational capabilities that has transformed the nature of this “learning medicine” model. The
rapidly growing field of e-health describes the use of electronic communication tools and
computers by patients to monitor and maintain their own health and by doctors to provide better
care. Here we will briefly outline current e-health opportunities for multiple sclerosis (MS) care and
research with an emphasis on recent developments.
Real world dataMS Registries
Balances of risk to benefit vary across disease modifying treatments for MS (DMT). Previously,
guidance for their use came only from clinical trial data. However, these data describe outcomes
limited to small segments of the population followed for the minimal periods needed for
establishing efficacy (1). With the increasing harmonisation of routine clinical and patient centred
data and the potential for its digital capture, real-world data can be used to supplement this trial
data and address a range of important clinical questions (e.g., co-morbidities, patient prognosis,
the long-term safety of therapies and clinical effectiveness) (2). Nonetheless, real-world
observational data must be interpreted in the context of its potential sources of bias (e.g., consent
for participation is subject to bias, unmonitored data collection allows variations in its quality).
However, methods for quality control and validation of “big data” are being developed (3), e.g., the
large Swedish MS Registry has recently been audited for consistency of diagnoses through
linkage of individual-level MS registry data to other nationwide registers (4) and clinical chart
review (5). There are growing numbers of registries, increasing their aggregate
representativeness (6). Recognising this, the Europeans Medicine Agency has mandated their
greater use of these data for the discharge of new drug marketing authorisation requirements (7).
Analyses of real world registry data already inform better patient care. Studies based on these
data have made unique contributions particularly for understanding outcomes in smaller patient
groups poorly addressed in clinical trials, such paediatric-onset MS (8), or to contrast trajectories
for variously stratified patient groups (9).
Digitisation and standardisation of registries now makes them relatively easy to integrate for data
across centres and countries. The most important example of this is MSBase, by far the largest
internationally aggregated registry for MS and neuroimmunological disorders (10). Recent
applications using its database have improved estimates of the risk of development of secondary
progressive MS (SPMS) (11), more robustly demonstrated that prior use of disease-modifying
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therapy (DMT) lowers this risk and delays SPMS onset (12) and re-enforced conclusions that
current DMT do not slow disability progression in primary progressive MS (13).
Digital resources managed by people with MS
Web-based applications also can be used directly by people with MS (pwMS) to collect patient
reported outcome data. Data from Patients Like Me, perhaps the largest of these (14, 15), has
been used in many ways, such as to assess access to medicines (16) and perceptions of efficacy,
side effects and overall satisfaction with treatments (17), monitoring disease progression (18)and
informing pharmacovigilance and comparative effectiveness research, particularly for off-label
uses of medicine (19, 20). Other websites capture data specifically from pwMS (e.g., (21, 22).
However, while the promise of digital patient-reported data is clear, it has significant limitations.
For example, there is a potential for distortion of the data by unscreened contributions from people
without the disease of interest (although see recent reassuring audit data (17). The
representativeness of those contributing data also is difficult to define. Site questionnaires are
variably complete, exacerbating this problem. Moreover, there are few high quality patient-centred
questionnaires (23).
Electronic health records
Real world data concerning MS also is becoming available to researchers from routinely acquired
clinical data in hospital electronic health records (EHR) (24). EHR reduce some of the sampling
bias in registries maintained by individual clinicians (25) and can be remarkably complete (the UK
Clinical Practice Research Datalink collects de-identified patient data from participating general
practices across the UK covering more than 45 million patients across the country (26). EHR can
be used to understand associations between MS and other diseases or the impacts of treatments
for them (27). EHR allow linkages between personal and clinical data to allow relationships such
as that between socioeconomic status and MS progression (28). Even missed appointment data
provides an important source of information (29). The scope for EHR to be used in the way is
being enhanced using algorithms that enable unstructured clinical notes to be interrogated (14).
Digital tools for individual patient assessment and rehabilitationA central challenge for MS care and new drug development still lies in the assessment of disability
and its change in ways that are clinically meaningful (30). Wearable sensors that provide
continuous, long-term measures of performance dynamics represent a new frontier for e-health.
Most progress has been made for the assessment of walking and gait, disturbances in which can
present early in the disease, but often are undetectable using routine clinical tests and only
reported by the patient subjectively. (31-34). Quantitative assessments which provide sensitive,
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objective measures of gait across the full clinical spectrum of MS are well-precedented, but
traditionally have been limited to sophisticated movement laboratories, access to which is not
practical for most clinics. Wearable technologies that patients can use in their homes offers
benefits in terms of time, cost and, if worn for extended periods of time in the home setting,
generalizability to functions of everyday living. The data produced provides the clinician with the
ability to detect, track and promptly address any changes in ambulatory function remotely between
clinical visits throughout the disease course.
Early studies in remote ambulatory monitoring in MS recorded physical activity over shorter
periods (3- 7 days) and favoured devices such as pedometers or first generation bi- or tri-axial
accelerometers. (35-37). This provoked interest in the accuracy of these data. Most studies in
MS (75%) have used activity counts from a model associated with the research-grade ActiGraph
tri-axial accelerometer (38). A recent systematic review characterised the use of these tools and
concluded that multiaxial accelerometers worn on the ankle are the most reliable of the “simple”
devices for step counting in neurological populations (39).
Future applications should incorporate more or the raw data from the accelerometer
measurements directly rather after data reduction as summary single measures (such as step
counts per day). To be most useful to clinicians, reports should more routinely include the
duration, frequency, intensity and amount of energy expended during daily physical activity (39).
Movement monitors algorithms have the potential to provide even more granular features of gait
(such as step length, step width, and cadence). In a recent study, one such approach
differentiated between healthy controls and pwMS, even when performance-based clinic
measures like the timed walk (T25FW) showed no differences (40). Use of wearables in
conjunction with other kinds of remote sensing could further improve the precision for assessing
disability in ambulant pwMS, e.g., using GPS with accelerometery to better determine walking
endurance. Notwithstanding such promising applications, drawbacks to widespread use of the
more sophisticated monitors needed include their higher cost, shorter battery life, and much higher
data generation rates and the complexities of analyses needed for rich feature extraction.
There is a growing range of devices available. Which to choose depends on goals. Longer-term
physical activity monitoring requires devices that promote adherence, are economical and user
friendly for both research team and participant. In a disease with so much inter- and intra-person
variability as MS, being able to monitor activity continuously, in the home setting, for long periods
has high value. Commercial fitness tracker wearables have most of these characteristics and are
advancing into the research space. Recent relevant studies include: Floodlight (a downloadable
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App using smartphone and smartwatch technology) (41), FITriMS (involving continuous, remote
activity measures using the proprietary Fitbit wrist-worn accelerometer over 1 year) and SPI2 (the
first phase 3, international placebo-controlled trial to use remote ambulatory monitoring as an
exploratory outcome to determine the efficacy of MD1003: high dose biotin) (38, 42) and Biostamp
(a recent study using novel skin-adherent sensors) (43, 44).
New directions for digital healthE-health tools and applications are growing. Another emerging area of growth for e-health in MS
involves extensions of telemedicine for care rehabilitation, e.g., for creation of a telehealth support
group participation to reduce loneliness in multiple sclerosis (45) or for cognitive rehabilitation (46).
Tele-rehabilitation appears to be well-accepted with high levels of adherence and satisfaction,
supporting its feasibility for home care of pwMS (47, 48). Even people living in urban communities
could benefit from being freed of the need to visit care centres, which become an increasing
burden with greater disability (47, 49). Although there is some evidence for its potential efficacy
(50, 51), other studies have been less encouraging (52).
However, with the almost ubiquitous use of mobile phones, health self-management apps are
increasingly dominating the telemedicine environment. More than 1000 smartphone apps for
medical self-management (with more than 100 unique applications) were identified recently, of
which almost a quarter are designed for problems of pwMS (53). Both telemedicine and smart
phone apps may require customization according to clinical and demographic features of patients
using them. Some pwMS, for example, have difficulty in navigating virtual reality environments
presented on a flat screen (54), while immersive visual presentation may lead to cybersickness in
others (55).
A few promising early studies have reported combining wearables with internet-based
interventions for gait rehabilitation (33, 56, 57). Feasibility was confirmed in a recent randomised
clinical trial (58). Early efforts using a smart tablet-based app for dexterity training have been
described (59)In the future, “gamification” of rehabilitation (and testing) apps promises could
promote adherence (60). There also is a potential to extend capabilities using robotics (61).
The largest single growth areas in technology for e-health make use of machine learning and
artificial intelligence. These will transform digital health from its currents relative focus on
advanced integration synthesis more towards decision support. Neuroradiology has been one of
the first medical beneficiaries of such tools. A recent application of quantitative radiomic
biomarkers discriminated well between neuromyelitis optica spectrum disorder and MS (62). More
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interesting is the application of such methods to discrimination problems that are fundamentally
uncertain, e.g., to test whether pwMS can be distinguished from healthy persons based solely on
Optical Coherence Tomography features (63), for the selection of patient-reported (PROs) and
clinical-assessed outcomes (CAOs) predictive of the future progression (64, 65) or using postural
sway measures for fall risk prediction (66). A limitation of these approaches is that they are
based on previously defined features in the data and have uncertain generalisability. An
advantage is that they rely on definitions of meaningful features in the images based on prior
knowledge so that the resulting ‘signatures” or models can be explained.
By contrast, AI attempts to reproduce the behaviour of the human brain as it makes decisions
based directly on “real world” inputs rather than on pre-defined features. Applications of AI involve
training an algorithm on a representive dataset, followed by validation with independent data. As
new kinds of data are encountered, the algorithm can be tuned to progressively improve
performance. The approach already has been applied widely in neurology to enhance the
interpretation of complex signals, e.g., by dimensional reduction, classification or image
parcellation (67). The origins of these tools in computer systems performing tasks that normally
are done by the human brain makes them ideal for the quantitative perception or scoring of
images, as demonstrated in a recent pilot for automated rating of the Brief. Visuospatial Memory
Test-Revised (BVMT-R), a recognized method to measure optical recognition deficits and their
progression (68). Another emerging area in e-health that is beginning to have an impact on MS
care involves use of the “internet of things”, the potential network of inter-relatable sensors or
devices that can interact with patients as part their daily lives (69). We are not aware of
applications to MS at present, but they can be expected soon.
ConclusionsE-health is enabling the development of an increasingly robust “learning health system” for MS. It
has created opportunities for large scale integration of datasets across centres and countries to
generate datasets large and comprehensive enough to characterise less common populations and
events and support the development of more meaningfully predictive models of individual
prognoses. The latter promise greater personalisation of care and more rapid discrimination of
the relative benefits and risks of new DMT. Patient centred data and tools should better empower
patients and improve health outcomes by enabling greater self-management of care. E-health
tools also are contributing to improved clinical trial designs for early proof of concept studies (70).
Neurologists and other care providers thus need to develop both the skills needed to integrate e-
health tools fully into clinical care and for a full understanding of the limitations and risks of their
use (71).
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AcknowledgmentsResearch underpinning this review was funded by the Progressive MS Alliance and the Medical
Research Council. Infrastructure was supported by the National Institute for Health Research
(NIHR) Biomedical Research Centre (BRC).
Declarations of InterestPMM acknowledges generous personal and research support from the Edmond J Safra
Foundation and Lily Safra, an NIHR Senior Investigator Award and the UK Dementia Research
Institute. He is reimbursed for service on a Scientific Advisory Board to Ipsen Pharmaceuticals.
He has received consultancy fees from Roche, Adelphi Communications, Celgene and Biogen
OrbiMed. He has received honoraria or speakers’ fees from Novartis and Biogen and has
received research or educational funds from Biogen, Novartis and GlaxoSmithKline. L. Leocani
has received honoraria for consulting services and/or speaking activity from Merck, Biogen,
Novartis, Roche, Almirall, Excemed.
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