Table 2.
Percentage (and Number) of DexCom SEVEN System Results Falling within Various Zones of the Clarke Error Grid, Stratified by YSI Glucose Concentrationsa
| YSI glucose range | Total | A + BN (%) | AN (%) | BN (%) | CN (%) | DN (%) | EN (%) |
|---|---|---|---|---|---|---|---|
| 40–80 mg/dl | 206 | 180 (87.4) | 139 (67.5) | 41 (19.9) | 2 (1.0) | 23 (11.2) | 1 (0.5) |
| 81–120 mg/dl | 444 | 440 (99.1) | 305 (68.7) | 135 (30.4) | 4 (0.9) | 0 (0.0) | 0 (0.0) |
| 121–180 mg/dl | 643 | 641 (99.7) | 443 (68.9) | 198 (30.8) | 2 (0.3) | 0 (0.0) | 0 (0.0) |
| 181–240 mg/dl | 511 | 508 (99.4) | 377 (73.8) | 131 (25.6) | 3 (0.6) | 0 (0.0) | 0 (0.0) |
| 241–300 mg/dl | 339 | 324 (95.6) | 248 (73.2) | 76 (22.4) | 3 (0.9) | 12 (3.5) | 0 (0.0) |
| 301–400 mg/dl | 175 | 175 (100) | 124 (70.9) | 51 (29.1) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Overall | 2318 | 2268 (97.8) | 1631 (70.4) | 637 (27.5) | 14 (0.6) | 35 (1.5) | 1 (0.0) |
a
Glucose measurements between 40 and 400 mg/dl, inclusive, are included.