Table 1.
Failure to Exclude Frequently Repeat Glucose Values Overestimated Both Hypoglycemia and Hyperglycemiaa
| Repeat values | No grouping | Grouped by patient-day | ||||
|---|---|---|---|---|---|---|
| Includes | Excludes | p value | Includes | Excludes | p value | |
| Mean glucose (standard deviation) | 175.1 (73.5) | 173.6 (68.2) | <.0001 | 172.4 (55.9) | 171.7 (53.8) | .0002 |
| Median glucose | 158 | 158 | .08 | 159.7 | 160.4 | .02 |
| % hypoglycemia (<60) | 0.7 | 0.3 | <.0001 | 2.1 | 1.2 | –b |
| % hyperglycemia (>350) | 3.0 | 2.3 | <.0001 | 6.7 | 5.7 | –b |
| % outside range (<80 or >150) | 57.8 | 57.2 | <.0001 | 84.3 | 84.0 | –b |
a
All glucose values are expressed in mg/dl.
b
P values could not be calculated for comparisons involving measures based on at least one episode per day, since excluding repeat values could not increase these proportions.