I didn't like that much dex for several reasons, and when I showed the shart to Dr. L she reduced my dex dosage from 40 mg to 20 mg. This week I did the measurements again for "dex day," and found the glucose levels significantly lower, as expected.
Here are averages for each of three different days:
Bottom line: 20 mg of dex puts the average glucose approximately midway between 40 mg of dex and no dex. Huh - no surprise.
Here is a TABLE showing actual measurements and times.
Below is a chart. Click to enlarge.