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Thesis (Bachelor's)

Reykjavík University > Samfélagssvið / School of Social Sciences > BSc Íþróttafræðideild / Department of Sport Science >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1946/39300

Title: 
  • A validation study of the Withings ScanWatch compared to the gold standard polysomnography
Degree: 
  • Bachelor's
Abstract: 
  • Objective: To test the agreement between two measuring methods, the smartwatch Withings ScanWatch (WSW), and the gold standard polysomnography (PSG), for sleep parameters (total sleep time [TST], wake after sleep onset [WASO], light sleep, deep sleep, average heart rate)
    Methods: A total of 24 adult participants (14 men and 10 women), age 22 to 69 years (M = 40.1 ± 13.9 years), were recruited in the study. All participants slept with the PSG and WSW simultaneously for one night at home. Data collected from both devices were analysed and compared using descriptive statistics, paired t-tests, Pearson correlation and Bland-Altman plots.
    Results: A significant difference (bias) was found between measurements, for TST, WASO and deep sleep, overestimated TST by 57 minutes on average, underestimated WASO by 11 minutes and overestimated deep sleep by 68 minutes. No significant difference was, however found for light sleep and average HR.
    Conclusion: The WSW showed mixed results compared to PSG, with differences in total sleep duration, wake time and deep sleep duration but a good agreement for light sleep duration and heart rate. Further validation is needed with epoch-by-epoch comparison throughout the night for the WSW compared to PSG.
    Key words: Sleep stages, sleep duration, wearable devices, smartwatch, validation

  • Abstract is in Icelandic

    Markmið: Að bera saman mælingar snjallúrs Withings ScanWatch (WSW) og svefnmælingu (polysomnography) á svefnbreytum (heildarsvefntíma, vöku, grunnsvefni, djúpsvefni, meðal og meðalhjartsláttartíðni).
    Aðferð: Samtals 24 einstaklingar, 14 karlar og 10 konur á aldrinum 22 til 69 ára (meðaltal ± staðalfrávik = 40.1 ± 13.9 ár), tóku þátt í rannsókninni. Allir þátttakendur sváfu bæði með svefnmælingu og snjallúr í eina nótt, heima hjá sér. Niðurstöður beggja tækja voru bornar saman og greindar. Notast var við lýsandi tölfræði, pöruð t-próf, fylgnipróf og Bland-Altman rit.
    Niðurstöður: Marktækur munur var á milli mælinga tækjanna á heildarsvefntíma, vökutíma og djúpsvefni. WSW ofmat heildarsvefntíma að meðaltali um 57 mínútur, vanmat vökutíma að meðaltali um 11 mínútur og ofmat djúpsvefn að meðaltali um 68 mínútur. Hins vegar var ekki marktækur munur á grunnsvefni og meðalhjartsláttartíðni.
    Ályktanir: Niðurstöður voru misjafnar en WSW bar vel saman við polysomnograpy um meðalhjartsláttartíðni og grunnsvefni. Þörf er á frekari rannsóknum.
    Lykilorð: svefnstig, svefnmagn, svefnmælingar, svefnúr, samanburðarrannsókn

Accepted: 
  • Jun 15, 2021
URI: 
  • http://hdl.handle.net/1946/39300


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