Sömnregistrering med hjälp av ActiGraph GT9X Link och Polar Vantage V2 - en jämförande studie

Sammanfattning: Background:  In recent years the interest in self-care has expanded, with sleep playing a big part. Concurrently, the development of self-monitoring wristwatches has enabled individuals to track their sleep. Commonly these are called sleep trackers. Since many sleep trackers are not developed for clinical use, their credibility is questionable, and it is unclear how they compare to clinical sleep trackers.  Aim: This study aims to obtain a clear understanding of which of the sleep trackers ActiGraph GT9X Link and Polar Vantage V2 is most reliable when measuring sleep. ActiGraph GT9X Link is developed for clinical purposes, and Polar Vantage V2 is developed for commercial use. To quantify the comparison, the differences in measuring multiple sleep parameters will be observed.  Method:  An empirical study was conducted with 16 participants included. Each participant wore both watches for one night’s sleep and journaled their sleep in a sleep diary. The data was then collected and analyzed with a Wilcoxon signed-rank test.  Results:  The result highlighted that ActiGraph GT9X Link had a wider distribution of the sleep parameters in comparison to Polar Vantage V2, with three out of five sleep parameters showing a significant difference. Polar Vantage V2 also conformed better to the sleep diary for almost all 16 participants.  Conclusion:  Polar Vantage V2 has a significantly higher accuracy in tracking many sleep parameters than ActiGraph GT9X Link. What the future holds for ActiGraph GT9X Link is unclear since it was outperformed by a commercially used wristwatch which does not meet the EU requirements of a medical device by MDR (regulations for medical devices, EU 2017/745).