Table 6.
Effect of System Rate of Change on Continuous Glucose Monitoring System and Reference Agreement
| CGM ROC [mg/(dL·min)] | No. of paired CGM system-YSI reference readings | Percent within 15/15% reference | Percent within 20/20% reference | Percent within 30/30% reference | Percent within 40/40% reference | MARD (%) [95% CI] |
|---|---|---|---|---|---|---|
| Less than −2 | 251 | 80.9 | 90.8 | 95.6 | 98.4 | 10.5 (8.2–14.1) |
| −2 to −1 | 1285 | 82.8 | 91.7 | 96.9 | 98.7 | 10.1 (8.9–11.4) |
| −1 to 1 | 12,740 | 86.8 | 94.1 | 98.4 | 99.5 | 8.5 (7.7–8.8) |
| 1 to 2 | 1188 | 80.6 | 89.7 | 97.8 | 99.7 | 9.4 (8.8–10.3) |
| >2 | 515 | 81.9 | 91.1 | 97.5 | 99.4 | 9.4 (8.3–10.2) |
In-clinic accuracy is assessed compared with venous YSI reference measurement. The percentage of system readings within ±15 mg/dL or 15% of YSI reference values (15/15%), ±20 mg/dL or 20% of YSI reference values (20/20%), ±30 mg/dL or 30% of YSI reference values (30/30%), or ±40 mg/dL or 40% of YSI reference values (40/40%) are reported.