What they mean • How to use them

The overall Z•TEST Sleep Score is a composite sleep score that includes assessments of your Sleep Time (time asleep), Depth (time spent in deep sleep), REM (time spent in REM sleep), Onset (time to fall asleep) and Efficiency (degree and amount of non-disrupted sleep during the time you have allotted for sleep). The aggregate score is reported as a single score ranging from 0 to 100. Each of the sub scores also range from 0 to 100.

All scores are based upon comparisons to established sleep metrics measured in healthy young adults – Ideal Normal Sleep or INS. Don’t be too surprised if your scores are quite low and recognize that what you would like to achieve early on, is modest improvement. However, with time (and patience), the SOLTEC•HEALTH™ System can assist you significantly and your scores will progressively climb. To track your progress, compare your baseline score to a 7-day running average.

Below are descriptions of the Z•TEST Subscores:

Sleep Time

This score reflects the duration of your sleep, as compared to healthy young adults (Ideal Normal Sleep). Normal sleep time is 7 ½ hours or more.

Depth & REM

These scores are determined by the amount of time you spent in Deep (Delta) and REM sleep respectively. Deep and REM sleep each comprise roughly 120 minutes of total sleep time in healthy young adults.


This score reflects your ability to fall asleep in a reasonable amount of time. It normally takes under 30 minutes to fall asleep after going to sleep.


This score is determined by how soundly you slept in the time you should allot for sleep (should be at least 7½ hours).