The normal value of health effect index de is the general or typical value of a certain body structure or functional state of healthy people, which is within the common variation range of this population. Generally speaking, it indicates good health, that is, it is in a low probability range of suffering from the corresponding disease, but the possibility of getting sick is not ruled out. On the other hand, if a person's measured value of an index is outside the "normal range", he may have really changed abnormally, but it may also be a few "normal" individuals with extreme results.
Your health indicators are too broad to elaborate.