Table 2.
Summary of Paired Differences in CGM Metrics Between Sensors of the Same Model Within the Same Subject.
| CGM metric | G5 |
FL |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min. | 25th percentile | Median | 75th percentile | Max. | n | Min. | 25th percentile | Median | 75th percentile | Max. | n | |
| Mean CGM glucose (mg/dL) | 0.1 | 1.6 | 3.6 | 4.8 | 7.2 | 19 | 1.4 | 4.4 | 8.2 | 13.6 | 45.6 | 15 |
| SD of CGM glucose (mg/dL) | 0.0 | 0.8 | 1.7 | 4.0 | 10.5 | 19 | 0.1 | 1.5 | 2.1 | 5.8 | 19.3 | 15 |
| CV of CGM glucose | 0.1% | 0.4% | 0.8% | 1.8% | 6.4% | 19 | 0.2% | 1.0% | 1.8% | 2.5% | 3.7% | 15 |
| TbR<70 | 0.1% | 0.4% | 0.5% | 1.1% | 1.8% | 19 | 0.0% | 1.5% | 2.6% | 5.1% | 22.8% | 15 |
| TiR70-180 | 0.0% | 0.9% | 1.7% | 2.3% | 5.9% | 19 | 0.1% | 1.4% | 2.2% | 4.3% | 10.4% | 15 |
| TaR>180 | 0.1% | 0.8% | 1.6% | 2.3% | 4.6% | 19 | 0.6% | 2.1% | 4.0% | 5.0% | 15.5% | 15 |
| TbR<54 | 0.0% | 0.1% | 0.3% | 0.6% | 1.2% | 19 | 0.0% | 0.3% | 1.0% | 1.4% | 14.1% | 15 |
| TbR54-<70 | 0.0% | 0.2% | 0.3% | 0.6% | 1.2% | 19 | 0.2% | 1.0% | 2.0% | 3.3% | 8.7% | 15 |
| TaR>180-250 | 0.3% | 0.7% | 1.7% | 1.9% | 2.6% | 19 | 0.1% | 1.3% | 1.9% | 4.7% | 14.8% | 15 |
| TaR>250 | 0.1% | 0.3% | 0.7% | 2.2% | 4.0% | 19 | 0.1% | 0.8% | 1.5% | 2.0% | 6.9% | 15 |
| GMI | 0.00% | 0.04% | 0.09% | 0.11% | 0.17% | 19 | 0.03% | 0.11% | 0.20% | 0.33% | 1.09% | 15 |
| CV category identical? | Yes: | 15 | No: | 4 | Yes: | 15 | No: | 0 | ||||
Differences for time spent in various glycemic ranges, for glucose management indicator (GMI), and for coefficient of variation (CV) are shown as absolute changes (ie, percentage points). CV was categorized as either stable or unstable.
Abbreviations: CGM, continuous glucose monitoring; FL, FreeStyle Libre; G5, Dexcom G5; SD, standard deviation; TaR, time above range; TbR, time below range; TiR, time in range.
TbR<70, time spent <70 mg/dL; TiR70-180, time spent between 70 and 180 mg/dL; TaR>180, time spent >180 mg/dL; TbR<54, time spent <54 mg/dL; TbR54-<70, time spent ≥54 and <70 mg/dL; TaR>180-250, time spent >180 and ≤250 mg/dL; and TaR>250, time spent >250 mg/dL.