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The second half does run 27 mg/dL lower (254 → 227 mg/dL). But your sensor changed on August 21, right where those two halves divide — so “you changed” and “the sensor changed” are one difference here, not two. Wearing the next sensor across a change you care about would separate them.
13 days of Dexcom G7 readings with at least 18 hours of wear, Aug 15, 2026 – Aug 27, 2026. Each dot is one day's average. The dashed lines are the two halves being compared.
You wore it 24 hours a day in the first half and 24 in the second, so neither half is thinner than the other. 1 part-day left out for having under 18 hours.
You wore 2 sensors, and the changeover on Aug 21 lands where the halves split. So “you changed” and “the sensor changed” are one difference here, not two. Their averages ran 229–256 mg/dL — a spread of 27, the same size as the 27 between the halves.
Shuffling your days between the two halves at random produces a gap this big about 3% of the time, so this one is unlikely to be luck. Dropping each sensor's first day leaves a gap of 29 mg/dL across 10 days.
| Day | Average mg/dL | Hours worn | Half |
|---|---|---|---|
| Aug 15, 2026 | 225 | 24 | first |
| Aug 16, 2026 | 251 | 24 | first |
| Aug 17, 2026 | 248 | 24 | first |
| Aug 18, 2026 | 246 | 24 | first |
| Aug 19, 2026 | 264 | 24 | first |
| Aug 20, 2026 | 287 | 24 | first |
| Aug 21, 2026 | 257 | 24 | first |
| Aug 22, 2026 | 210 | 24 | second |
| Aug 23, 2026 | 200 | 24 | second |
| Aug 24, 2026 | 225 | 24 | second |
| Aug 25, 2026 | 228 | 24 | second |
| Aug 26, 2026 | 252 | 24 | second |
| Aug 27, 2026 | 246 | 24 | second |
Any questions or comments, please reach out to bill@perscy.com. A person reads every one.
Made by LifeBot from your CGM export. It describes a pattern in your readings; it is not medical advice.