Friday, February 19, 2016


11 Feb 2016                                          -2-

Our son gave me the BASIS wrist body monitor at his son’s graduation from DU. It monitors heart rate, skin temperature, sweat, sleep interruptions and toss & turns and other things. It then calculates a Sleep Score with REM (mind refresh), light, and deep (body refresh) sleep.

Both the BASIS and the Sleep Number bed values are unedited, except very low values were discarded when the activity traces were markedly incomplete. The change and range of values, I believe, are as important as the actual values.

Chart 2 of BASIS values illustrates the above point. On the left side of the chart the values cyclically change from one extreme to another (40s to 90s). This is the end of a series that starts over a month earlier.

On the right side of Chart 2, the values fall into small groups with a few exceptions. The exceptions could be called outliers and be dismissed if it were not that these exceptions are reduced values from the norm for the previous almost two months.

Something happened by day 36 (22 Dec 2016) that resulted in continuing high BASIS Sleep Score values. This took place before the Number Bed gap after moving into Provision Living at Columba (MO). The increase in Sleep IQ values occurred at about the same time (Chart 1).

The recommendation to sleep five days for each Number Bed trial indicates that the body takes time to integrate changes in Sleep Number, head and foot elevation, and pillow that are summed into the Sleep IQ value. The BASIS Sleep Score values are no more responsive in detecting change but are spread out over a range of over 50 points rather then 30 points.

The two sampling systems are yielding different appearing results from the same subject. Neither system can identify the cause of the change that accoured in both systems. 

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