Abstract

Sleep deficiency impacts the quality of life and may have serious health consequences in the long run. Questionnaire-based subjective assessment of sleep deficiency has many limitations. On the other hand, objective assessment of sleep deficiency is challenging. In this study, we propose a polysomnography-based mathematical model for computing baseline sleep deficiency severity score and then investigated the estimation of sleep deficiency severity using features available only from wearable sensor data including heart rate variability and single-channel electroencephalography for a dataset of 500 subjects. We used Monte-Carlo feature selection (MCFS) and inter-dependency discovery for selecting the best features and removing multi-collinearity. For developing the Regression model we investigated both the frequentist and the Bayesian approaches. An artificial neural network achieved the best performance of RMSE = 5.47 and an R-squared value of 0.67 for sleep deficiency severity estimation. The developed method is comparable to conventional methods of Functional Outcome of Sleep Questionnaire and Epworth Sleepiness Scale for assessing the impact of sleep apnea on sleep deficiency. Moreover, the results pave the way for reliable and interpretable sleep deficiency severity estimation using single-channel EEG.

Highlights

  • Sleep is an important biological process and plays a key role in restoring energy, solidifying and consolidating memories, and repairing body cells

  • Research suggests that complete sleep deprivation significantly impairs attention and working memory [2]

  • We previously reported a framework for Smart Health (sHealth) and conducted a pilot study to evaluate the technical feasibility of the framework [16]

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Summary

Introduction

Sleep is an important biological process and plays a key role in restoring energy, solidifying and consolidating memories, and repairing body cells. It is controlled by the circadian biological clock and sleep/wake homeostasis and helps regulate metabolism and cardiovascular function [1]. Neither body nor the brain can function properly without sufficient sleep. Research suggests that complete sleep deprivation significantly impairs attention and working memory [2]. It affects other important functions, such as long-term memory and decision-making

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