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Validation of Sleep Measurements of an Actigraphy Watch: Instrument Validation Study
Mari Waki;
Ryohei Nakada;
Kayo Waki;
Yuki Ban;
Ryo Suzuki;
Toshimasa Yamauchi;
Masaomi Nangaku;
Kazuhiko Ohe
ABSTRACT
Background:
The iAide2 physical activity monitoring system includes diverse
measurements and wireless features useful to researchers. Its sleep measurements are not
well validated.
Objective:
We aimed to validate iAide2’s sleep duration and total sleep time
measurements and calibrate them if needed.
Methods:
We performed free-living sleep monitoring in 6 convenience-sample
participants without sleep disorders over 64 nights and compared the iAide2 to the
previously-validated MotionWatch 8.
Results:
The ICCs [95% CI] for sleep duration (0.69 [-0.07, 0.91]) and total sleep time
(0.56 [-0.07, 0.82]) were moderate, and improved to 0.96 [0.94, 0.98] and 0.82 [0.71,
0.88] with calibration.
Conclusions:
High accuracies after calibration validate use of iAide2’s sleep
measurement functions.
Citation
Please cite as:
Waki M, Nakada R, Waki K, Ban Y, Suzuki R, Yamauchi T, Nangaku M, Ohe K
Validation of Sleep Measurements of an Actigraphy Watch: Instrument Validation Study