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Journal of Peking University (Health Sciences) ›› 2021, Vol. 53 ›› Issue (5): 942-945. doi: 10.19723/j.issn.1671-167X.2021.05.022

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Comparison and correlation analysis of sleep parameters between watch-type sleep monitor (Actiwatch) and polysomnography

HUO Yang1,ZHOU Bing2,HE Hong-yan3,ZHAO Long2,ZHANG Xue-li2,LI Jing2,ZUO Yu-hua2,ZHENG Yu1,REN Zheng-hong4,HAN Fang2,ZHANG Jun1,△()   

  1. 1. Department of Neurology, Peking University People’s Hospital, Beijing 100044, China
    2. Department of Pulmonology, Peking University People’s Hospital, Beijing 100044, China
    3. Department of Neurology, the Chest Hospital of Hebei Provence, Shijiazhuang 050041, China
    4. Department of Maternal and Child Health, Peking University School of Public Health, Beijing 100191, China
  • Received:2020-08-19 Online:2021-10-18 Published:2021-10-11
  • Contact: Jun ZHANG E-mail:who626@163.com

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Abstract:

Objective: With the rapid development of sleep medicine, there are various methods for detecting sleep diseases. This study compared the correlation between the lightweight watch-type sleep monitor (Actiwatch) and the “gold standard” polysomnography (PSG) in the Chinese population, in order to provide a basis for clinical application. Methods: From August 2018 to December 2019, 121 subjects who simultaneously performed sleep breathing monitoring (PSG) and wearing a watch-type sleep monitor (Actiwatch) in the Sleep Center of Peking University People’s Hospital were enrolled. All subjects received PSG and Actiwatch at the same time, and filled out the sleep diary next morning. Monitoring indicators were collected for linear correlation analysis and paired t test to compare the differences. Results: Under low sensitivity conditions, the correlation coefficient of total sleep time (TST) between PSG and Actiwatch was 0.53 (P<0.05). Paired t test analysis showed that there was no significant difference between the TSTs of Actiwatch and PSG (t=-0.890, P=0.36). According to age stratification, the smaller the age, the stronger the correlation between the TSTs of Actiwatch and PSG, and the coefficient could be up to 0.92 (P<0.05). Paired t test showed that there was no significant difference between them (t=-1.057, P=0.35). According to the stratification by diagnosis, the correlation coefficient between the TSTs of Actiwatch and PSG in normal PSG group could be as high as 0.79 (P<0.05), the results of paired t test showed that there was no significant difference between the TSTs of Actiwatch and PSG in normal PSG group (t=-0.784, P=0.44). Conclusion: As a wearable home recorder, when the analysis parameters of Actiwatch were set as low sensitivity, PSG and Actiwatch had the highest TST correlation. The younger the age, the stronger correlation between the TSTs of Actiwatch and PSG. The PSG and Actiwatch subjects with normal PSG presentation had a higher TST correlation.

Key words: Sleep, Watch-type sleep monitor, Actigraphy, Polysomnography

CLC Number: 

  • R338.63

Table 1

Comparison of related sleep parameters between PSG and Actiwatch (different sensitivities)"

Group TRT/min TST/min SE/%
x ?±s r x ?±s r x ?±s r
PSG 486.88±35.54 394.48±64.00 81.22±12.94
Actiwatch (low) 517.42±48.47* 0.47 399.59±66.67* 0.53 77.40±12.17* 0.46
Actiwatch (medium) 517.42±48.47* 0.47 420.75±62.55* 0.51 81.48±11.12* 0.45
Actiwatch (high) 517.42±48.47* 0.47 440.94±62.63* 0.47 85.37±10.90* 0.42

Table 2

Comparison of related sleep parameters between PSG and Actiwatch (low sensitivity) after age grouping"

Age group/years Monitoring TRT/min TST/min SE/%
x ?±s r x ?±s r x ?±s r
≤18 PSG 519.28±45.61 442.30±61.74 85.81±14.36
Actiwatch 551.80±61.53 0.20 356.40±76.96* 0.92 65.54±7.10 0.77
19-40 PSG 448.12±39.68 396.54±68.21 81.37±13.50
Actiwatch 517.27±45.56* 0.55 400.71±67.57* 0.67 77.53±12.07* 0.60
41-65 PSG 481.35±29.93 390.96±61.04 81.48±12.91
Actiwatch 514.69±50.21 0.46 400.73±64.02* 0.47 78.02±11.54* 0.38
≥66 PSG 500.71±36.00 381.94±61.72 76.09±9.62
Actiwatch 517.89±43.65 0.17 410.11±77.74 0.45 78.99±12.76 0.48

Table 3

Comparison of related sleep parameters between PSG and Actiwatch (low sensitivity) after diagnosis grouping"

Group Monitoring TRT/min TST/min SE/%
x ?±s r x ?±s r x ?±s r
Narcolepsy PSG 488.28±39.36 416.23±55.72 85.58±10.41
Actiwatch 518.80±69.54* 0.71 373.20±77.05 0.45 72.06±12.93 0.38
Normal PSG PSG 482.40±24.38 388.29±70.50 80.40±14.00
Actiwatch 497.30±41.61* 0.51 394.90±72.94* 0.79 79.46±13.92* 0.72
OSAS PSG 488.37±36.41 392.63±62.76 80.68±12.95
Actiwatch 525.09±44.32* 0.37 406.64±61.22* 0.47 77.63±11.10* 0.40
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