Application US20190008451

System and Method for Assessing Sleep State
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US20190008451

1. A method of assessing sleep state of an individual, the method comprising: (4) (5)

obtaining a time series of accelerometer data from an accelerometer device mounted upon or to the individual;

determining from the time series of accelerometer data a percentage of time in which the individual is substantially immobile (% TA);

determining from the time series of accelerometer data a typical time of continuous immobility (MTI);

combining the % TA and MTI to produce a sleep score; and

if the sleep score exceeds a threshold, outputting an indication that the individual is asleep.

2. The method of claim 1 when used in a non-clinical setting such as the individual's home. (0)

3. The method of claim 1 applied to assess sleep state of Parkinsonian subjects. (0)

4. The method of claim 1 applied to assess sleep state of non-Parkinsonian subjects. (0)

5. The method of claim 1 wherein producing the sleep score further comprises summing or otherwise combining 2 or more of a set of sleep-related variables derived from the accelerometer data. (6) (0)

6. The method of claim 5 wherein the sleep related variables include a variable reflecting the individual's attempts at being active. (0)

7. The method of claim 5 wherein the sleep related variables include a variable reflecting the individual's inactivity while awake. (0)

8. The method of claim 5 wherein the sleep related variables include a variable reflecting the individual's immobility while asleep. (0)

9. The method of claim 5 wherein the sleep related variables include a variable reflecting the individual's sleep duration. (0)

10. The method of claim 5 wherein the sleep related variables include a variable reflecting the individual's sleep fragment length. (0)

11. The method of claim 5 wherein the sleep related variables include a variable reflecting the individual's Sleep Quality. (0)

12. A system for assessing sleep state of an individual, the system comprising: (0) (2)

13. A non-transitory computer readable medium for assessing sleep state of an individual, comprising instructions which, when executed by one or more processors, causes performance of the following: (0) (5)

obtaining a time series of accelerometer data from an accelerometer device mounted upon or to the individual;

determining from the time series of accelerometer data a percentage of time in which the individual is immobile (% TA);

determining from the time series of accelerometer data a median or typical time of continuous immobility (MTI);

combining the % TA and MTI to produce a sleep score; and

if the sleep score exceeds a threshold, outputting an indication that the individual is asleep.

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Application US20190008451

System and Method for Assessing Sleep State

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