Estimating Sleep Stages Using a Head Acceleration Sensor.

There were highly significant differences in all the features: AVG (1.88 × 10 −1 ± 0.20 × 10 −1 m/s 2 and 1.87 × 10 −2 ± 7.37 × 10 −3 m/s 2 , p < 0.01), VGM (1.12 × 10 −1 ± 1.94 × 10 −1 (m/s 2 ) 2 and 3.24 × 10 −4 ± 2.07 × 10 −3 (m/s 2 ) 2 , p < 0.01), FS (1.83 ± 1.56 (m/s 2 )/Hz and 1.85 × 10 −1 ± 9.40 × 10 −2 (m/s 2 )/Hz, p < 0.01),AJJI (1.22 ± 1.72 × 10 −1 s and 1.12 ± 1.80 × 10 −1 s, p < 0.01), and VJI (2.19 × 10 −1 ± 1.93 × 10 −1 s 2 and 1.70 × 10 −2 ± 2.80 × 10 −2 s 2 , p < 0.01). 3.3.

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