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EDITORIAL
Articial Intelligence in Sleep Medicine: The Dawn
of a New Era
Ahmed Salem BaHammam
1,2
1
Department of Medicine, University Sleep Disorders Center and Pulmonary Service, King Saud University, Riyadh, Saudi Arabia;
2
King Saud
University Medical City, Riyadh, Saudi Arabia
Correspondence: Ahmed Salem BaHammam, University Sleep Disorders Center, Department of Medicine, College of Medicine, King Saud University,
Box 225503, Riyadh, 11324, Saudi Arabia, Tel +966-11-467-9495, Fax +966-11-467-9179, Email ashammam2@gmail.com
The convergence of articial intelligence (AI) and machine learning (ML) with modern medicine has not only opened up
unprecedented opportunities for innovation but also gained recognition from prominent publications, including Nature
and Science of Sleep, for their transformative potential in sleep medicine research and clinical practice. As such, Nature
and Science of Sleep welcomes explorations into the applications and implications of AI in the eld.
AI enables machines and software to perform tasks such as problem-solving, pattern recognition, learning, and
understanding language, which traditionally required human cognition. Meanwhile, ML—a subset of AI—enhances these
capabilities further with algorithms that learn and improve from data over time. The eld of sleep medicine stands at the
threshold of a transformative revolution, propelled by swift progress in AI and ML. Due to the inherently digital nature of
data collected in this eld, sleep medicine is uniquely positioned to harness AI and ML. Polysomnography, the gold
standard diagnostic tool, produces extensive physiological data in digital formats such as EEG, ECG, EMG, and
respiratory signals, making it ripe for AI analysis. This wealth of structured digital data makes sleep medicine an
ideal candidate for the application of AI and ML algorithms, which excel at identifying complex patterns and relation-
ships within large datasets. Additionally, the widespread availability of consumer sleep technologies, like wearables,
expands these opportunities, allowing ML to extract novel insights from extensive real-world sleep data.
1,2
This editorial
aims to highlight the current uses of AI in sleep medicine and research, validation and ethical challenges, and the exciting
future prospects. Figure 1 illustrates the breadth of potential AI applications in sleep medicine practice and research.
Automating Sleep Study Scoring
The application of AI to automate sleep study scoring was one of the earliest and most promising use cases in sleep
medicine, primarily due to the inherently digital nature of collected data.
3
Manual scoring of sleep studies is both time-
consuming and labor-intensive, and liable to inter-scorer variability. By contrast, ML algorithms trained on large datasets
have demonstrated sleep staging accuracy comparable to interrater reliability among human scorers, with reported
Cohen’s kappa (κ) values reaching up to 0.80.
3
Such high-performing algorithms can streamline the sleep staging
process, potentially reducing the time and cost associated with manual scoring. Moreover, standardizing sleep staging
through autoscoring can enhance the consistency and reliability of research ndings across various studies and institu-
tions. AI does not have to necessarily replace human scoring, but it can help in saving time. A recent study showed that
semi-automated sleep scoring systems signicantly reduce the workload on clinicians by directing their attention to the
most critical areas, thereby enhancing overall efciency.
4
This advancement highlights the potential of AI in standardiz-
ing sleep scoring and reducing interrater variability—an important development as it provides independent verication of
the real-world accuracy of these tools. Nevertheless, thoroughly validating AI models using diverse clinical data as a vital
step for their adoption in clinical settings is still needed.
5
Building on these advancements, the FDA has cleared a few auto-scoring software systems for use,
6
and the
American Academy of Sleep Medicine (AASM) has initiated a two-year pilot program to certify autoscoring software,
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aiming to further validate these tools against expert manual scoring.
7
This certication program aims to independently
assess the real-world accuracy of autoscoring software by comparing its performance to manual scoring by sleep experts.
By doing so, it provides accredited sleep facilities with condence in the reliability of autoscored results.
Enhancing Diagnosis and Personalized Treatment
Beyond autoscoring, AI can potentially revolutionize the eld of sleep medicine by enabling early detection, personalized
treatment, and improved management of sleep disorders. AI is being utilized to improve the diagnosis of sleep disorders such
as obstructive sleep apnea (OSA), going beyond just the apnea-hypopnea index.
8
Traditionally, OSA is diagnosed using
polysomnography, which requires an overnight stay in a sleep lab or home sleep apnea testing. Now, researchers are
developing AI models that can detect OSA using more accessible and affordable methods. For example, smartwatches can
now monitor blood oxygen levels (SpO2) with high accuracy, offering a potential tool for early OSA detection.
9–11
Moreover,
AI-based predictive models have shown promising accuracy in identifying individuals at risk of developing OSA using simple
predictors like age, sex, and body mass index, with reasonable success.
12,13
Additionally, AI has demonstrated promise in
aiding the diagnosis and subtyping of narcolepsy by analyzing clinical and polysomnographic data.
14,15
The application of AI and ML in personalizing treatments for sleep disorders offers a promising method for
enhancing patient adherence and outcomes.
16
AI algorithms have the capability to analyze extensive datasets to identify
trends and relationships among patient traits, sleep physiology, and responses to treatment. This detailed analysis
facilitates precise phenotyping and endotyping of OSA, paving the way for the creation of customized treatment
strategies that focus on the unique aspects of the disorder.
ML models are capable of predicting essential characteristics linked to OSA, including upper airway collapsibility,
reduced muscle responsiveness, a low arousal threshold, and abnormal ventilatory control.
17,18
A recent study introduced
a new data-driven approach, employing unsupervised multivariate principal component analyses and supervised machine
learning, to explore how four key OSA endotypes affect the severity of OSA as dened by polysomnography.
19
The
study also aimed to understand how typical polysomnographic and clinical variables might predict these endotypes.
19
Understanding a patient’s specic endotype can directly tailor treatment strategies. For instance, a machine learning
Figure 1 The gure showcases the spectrum of potential AI applications in sleep medicine practice and research, from advancing diagnostic accuracy and automating sleep
study analyses to informing research through data-driven predictions and optimizing therapeutic strategies.
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model was employed to forecast the results of different treatment methods, such as oral appliances,
20
allowing patients to
be matched with the therapy that would likely be most effective for them.
ML algorithms have demonstrated high accuracy in predicting CPAP therapy adherence in OSA patients.
21,22
By
analyzing large datasets, AI can identify correlations between patient characteristics and treatment responses, enabling
clinicians to tailor interventions to individual needs. This personalized approach to sleep therapy could revolutionize
patient care, improving outcomes and quality of life.
Randomized controlled trials have historically expressed skepticism regarding the efcacy of CPAP therapy in
reducing cardiovascular events among patients with OSA, often yielding debated and disappointing results.
23
However, recent advancements and the utility of ML have introduced new hope for discerning the efcacy of CPAP
by recognizing heterogeneity within the OSA population. A recent study utilized ML in the ISAACC trial dataset to
identify subgroups exhibiting varied responses to CPAP therapy.
24
The investigators found that CPAP therapy was
associated with fewer cardiovascular events in patients who have shorter durations of apnea events in OSA, compared to
those with longer durations who experienced higher risks.
24
This study underscores the importance of additional research
utilizing ML to create customized treatment approaches tailored to individual patient characteristics. Consequently, ML
could potentially redene the approach to precision medicine in OSA management, highlighting the importance of
incorporating personalized treatment protocols in future trials to overturn previously negative outcomes.
16
Similar
approaches can be investigated in other sleep disorders.
Furthermore, the application of AI/ML methods could signicantly enhance the prognostic assessment of OSA,
thereby improving patient care and outcomes. For instance, by employing advanced ML techniques to analyze the full
ventilatory distribution histogram in conjunction with other critical measures of OSA severity—such as hypoxic burden
and arousal indices—these sophisticated algorithms can offer a more comprehensive and precise evaluation of the disease
outcome.
25,26
Such detailed assessments are crucial for understanding the complete effects of OSA on patients and
tailoring treatment to individual needs more effectively.
In the eld of chronotherapy, mathematical modeling has shown promise in optimizing the timing of chemotherapy
treatments based on the circadian rhythms of patients to improve efcacy and minimize toxicity. These models streamline
the interpretation of complex drug interactions and timings, making it far more feasible to align treatments with circadian
cycles for improved survival outcomes. For instance, studies applying mathematical modeling in metastatic colorectal
cancer have found that treatments timed according to patient-specic circadian rhythms signicantly improved survival
compared to traditional schedules.
27
Recently, an ML method was developed to predict circadian time accurately using
just a few blood samples.
28
This innovation facilitates personalized chronotherapy in clinical settings by accurately
determining each patient’s internal physiological clock state. Such advancements highlight the potential of AI to tailor
treatment schedules, thereby enhancing the efcacy and safety of therapies.
29
AI and Advancing Sleep Medicine Research with Big Data
Integrating AI and ML with big data presents exciting opportunities for advancing sleep medicine research and
improving patient care.
30
Due to the wealth of digital physiological data collected through sleep studies, wearable
devices, and self-quantication systems, data analysis in sleep medicine research is particularly well-suited for AI/ML
applications.
31
The selection of appropriate training data is vital for developing accurate and generalizable AI models in
sleep medicine research, as the size, quality, and representativeness of the dataset can signicantly affect model
performance and the likelihood of overtting or undertting, which are issues related to how well the model predicts
new, unseen data compared to how it performs on the training data.
5
To mitigate these risks, researchers should strive to
use large, diverse, and representative datasets for training AI models, employ random sampling methods to guarantee that
the data accurately reects the target population, and apply iterative model training along with independent validation to
evaluate the stability and generalizability of the models developed.
32
Initiatives such as the National Sleep Research Resource (NSRR) and the UK Biobank have made large sleep datasets
publicly available, enabling researchers worldwide to leverage this valuable data for analysis. The proposed Human
Sleep Project aims to gather real-world sleep data from millions of people using online questionnaires, sleep diaries, and
recording devices to establish the true role of sleep and answer fundamental questions about sleep duration, quality, and
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the impact of genetic and environmental factors.
33
These publicly available resources open promising new avenues for
impactful real-world research on sleep medicine using AI. However, challenges remain regarding data standardization,
privacy issues, and the integration of multi-omics data (eg, transcriptomics, proteomics, metabolomics). Furthermore,
ensuring optimal data quality and having independent validation datasets are necessary, given that most existing
polysomnogram datasets originate from research studies with specic inclusion criteria and may not be applicable to
real clinical practice.
34
Addressing these challenges will be necessary for realizing the complete capacity of large datasets
and AI/ML in sleep medicine research and clinical applications, clearing the path for personalized sleep medicine and
improved patient outcomes.
16
AI in Sleep Neuroscience
In sleep neuroscience, AI has greatly improved the analysis of EEG signals, taking its use beyond just routine clinical
applications. Machine learning classiers of EEG signals during sleep do more than diagnose sleep-wake disorders and
categorize different sleep stages. They also provide a valuable method for studying the functions of sleep. Additionally, ML
models that analyze baseline EEG features have demonstrated potential in predicting various neurological diseases
associated with sleep disorders. Specically, they have shown effectiveness in determining the timing and subtype of
phenoconversion in patients with idiopathic Rapid Eye Movement sleep behavior disorder, a condition frequently preceding
neurodegenerative diseases.
35,36
Similarly, an ML algorithm analyzing sleep structure, frequency band powers, spindles,
slow oscillations, and coherence in 10,784 sleep studies across 8044 participants effectively distinguished between those
with dementia, mild cognitive impairment, and no cognitive impairments.
37
This ability underscores the signicant
potential of AI in detecting early markers of neurodegenerative disorders linked to sleep abnormalities, underscoring the
need for more comprehensive international research to rene these predictive models.
Ethical Considerations and Recommendations
As we explore the new frontier of AI applications in sleep medicine, addressing ethical and legal considerations is
essential. The AASM, in their position statement, has raised concerns about AI potentially exacerbating existing
healthcare inequities, such as sex disparities in evaluating sleep-disordered breathing.
3
It is vital to train AI algorithms
on diverse datasets to prevent bias and promote equitable care. While AI tools can enhance clinical decision-making and
data analysis, the ultimate responsibility for patient diagnosis, treatment, and research integrity rests with sleep medicine
providers and researchers. The AASM also offers several recommendations for sleep disorder centers considering AI-
based tools. These include demanding transparency from manufacturers about the intended population, goals, and
characteristics of datasets used for developing AI programs. Furthermore, AI applications should be subjected to
thorough testing on independent, standardized datasets representative of the target patient population to ensure general-
izability and performance on par with expert evaluations. Lastly, manufacturers should support sleep centers in assessing
the real-world efcacy and utility of AI software within their specic settings, ensuring that physician review and options
for manual rescoring of sleep studies are available to guarantee accurate diagnoses and optimal patient care. Moreover, it
is evident that we must validate and standardize ML methodologies in research, particularly in healthcare applications
like sleep medicine.
16
Robust data handling, model development, validation, and reporting guidelines should be
established to warrant the reliability, fairness, and reproducibility of ML-based ndings, facilitating their responsible
translation into clinical practice for personalized sleep disorders diagnosis and management.
38
In summary, the dawn of AI and ML in sleep medicine marks a pivotal era of enhanced diagnostic precision,
personalized treatment, and rapid advancements in quality research. This transition, driven by extensive research and big
data analytics that identify different endotypes of sleep disorders, opens new avenues for groundbreaking research while
necessitating rigorous ethical oversight to ensure its equitable implementation across diverse populations. As AI
technologies become increasingly integral to sleep medicine, ongoing research, interdisciplinary collaboration, and
thorough evaluation are essential to maximize their transformative potential globally.
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Disclosure
Professor BaHammam is the Editor-in-Chief for Nature and Science of Sleep. The author reports no other conicts of
interest in this work.
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