A machine learning model for multi-night actigraphic detection of chronic insomnia: development and validation of a pre-screening tool

S. Kusmakar, C. Karmakar, Y. Zhu, S. Shelyag, S. P. A. Drummond, J. G. Ellis, M. Angelova*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

We propose a novel machine learning-based method for analysing multi-night actigraphy signals to objectively classify and differentiate nocturnal awakenings in individuals with chronic insomnia (CI) and their cohabiting healthy partners. We analysed nocturnal actigraphy signals from 40 cohabiting couples with one partner seeking treatment for insomnia. We extracted 12 time-domain dynamic and nonlinear features from the actigraphy signals to classify nocturnal awakenings in healthy individuals and those with CI. These features were then used to train two machine learning classifiers, random forest (RF) and support vector machine (SVM). An optimization algorithm that incorporated the predicted quality of each night for each individual was used to classify individuals into CI or healthy sleepers. Using the proposed actigraphic signal analysis technique, coupled with a rigorous leave-one-out validation approach, we achieved a classification accuracy of 80% (sensitivity: 76%, specificity: 82%) in classifying CI individuals and their healthy bed partners. The RF classifier (accuracy: 80%) showed a better performance than SVM (accuracy: 75%). Our approach to analysing the multi-night nocturnal actigraphy recordings provides a new method for screening individuals with CI, using wrist-actigraphy devices, facilitating home monitoring.
Original languageEnglish
Article number202264
Pages (from-to)1-17
Number of pages17
JournalRoyal Society Open Science
Volume8
Issue number6
Early online date16 Jun 2021
DOIs
Publication statusPublished - Jun 2021

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