Table 2.
Mean and 95% Confidence Intervals of Hourly BG, ARD, and RD, As Well As Percentage of Results Within ±15 mg/dL or ±15%, ±20 mg/dL or ±20%, and ±30 mg/dL or ±30% for FreeStyle Libre (FL) and Dexcom G5 (G5) on Days with Induced Glucose Excursions. Glucose Excursions were Induced After Breakfast by Providing a Carbohydrate-Rich Breakfast and Delaying and Increasing the Corresponding Insulin Dose.
| Hour of the day | Mean BG [95% CI] [mg/dL] | MARD G5 [95% CI] [%] | MARD FL [95% CI] [%] | MRD G5 [95% CI] [%] | MRD FL [95% CI] [%] | ±15 mg/dL/±15% G5 [%] | ±15 mg/dL/±15% FL [%] | ±20 mg/dL/±20% G5 [%] | ±20 mg/dL/±20% FL [%] | ±30 mg/dL/±30% G5 [%] | ±30 mg/dL/±30% FL [%] | n |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 140.4 [123.3, 157.5] | 13.0 [8.9, 17.1] | 14.0 [8.9, 19.1] | 3.7 [−2.2, 9.6] | −11.6 [−17.3, −5.9] | 67.6 | 70.6 | 76.5 | 73.5 | 91.2 | 85.3 | 34 |
| 7 | 159.2 [140.4, 178.1] | 12.3 [9.3, 15.4] | 11.3 [8.9, 13.8] | −5.9 [−10.3, −1.4] | −8.6 [−11.9, −5.4] | 66.7 | 75.6 | 80.0 | 88.9 | 93.3 | 95.6 | 45 |
| 8 | 159.0 [142.3, 175.6] | 6.9 [4.8, 9.0] | 10.2 [8.0, 12.5] | 3.2 [0.3, 6.0] | −6.0 [−9.4, −2.6] | 87.8 | 80.5 | 92.7 | 87.8 | 100.0 | 100.0 | 41 |
| 9 | 297.2 [278.6, 315.7] | 8.5 [6.2, 10.8] | 7.6 [5.8, 9.5] | 1.2 [−2.3, 4.6] | −3.2 [−6.0, −0.4] | 81.4 | 86.0 | 93.0 | 95.3 | 97.7 | 100.0 | 43 |
| 10 | 214.2 [193.7, 234.8] | 15.7 [12.5, 18.8] | 10.3 [8.3, 12.3] | 14.4 [10.9, 18.0] | 3.6 [0.2, 7.0] | 55.1 | 77.6 | 67.3 | 89.8 | 93.9 | 98.0 | 49 |
| 11 | 120.6 [105.4, 135.8] | 18.1 [14.7, 21.6] | 12.5 [9.5, 15.6] | 14.8 [10.3, 19.3] | 3.6 [−0.9, 8.1] | 54.7 | 77.4 | 69.8 | 83.0 | 88.7 | 94.3 | 53 |
| 12 | 101.3 [92.0, 110.6] | 14.8 [12.1, 17.6] | 15.1 [11.7, 18.6] | 6.1 [1.5, 10.6] | −0.3 [−5.6, 5.0] | 69.6 | 71.4 | 83.9 | 82.1 | 94.6 | 92.9 | 56 |
| 13 | 95.7 [85.6, 105.7] | 12.7 [9.9, 15.4] | 12.4 [9.3, 15.5] | 5.1 [0.8, 9.5] | −5.8 [−10.3, −1.4] | 80.0 | 77.8 | 86.7 | 93.3 | 95.6 | 97.8 | 45 |
| 14 | 102.7 [93.1, 112.4] | 15.5 [12.0, 18.9] | 12.9 [9.3, 16.5] | 2.1 [−3.7, 7.9] | −5.4 [−10.5, −0.3] | 69.8 | 76.7 | 79.1 | 83.7 | 88.4 | 93.0 | 43 |
| 15 | 153.7 [141.6, 165.8] | 12.2 [9.5, 15.0] | 11.2 [8.6, 13.8] | 4.7 [0.4, 9.0] | −2.3 [−6.4, 1.9] | 73.9 | 73.9 | 82.6 | 78.3 | 93.5 | 97.8 | 46 |
| 16 | 138.0 [121.2, 154.8] | 12.6 [8.9, 16.3] | 11.3 [8.1, 14.5] | 9.5 [5.0, 14.0] | −1.9 [−6.6, 2.9] | 66.7 | 76.9 | 82.1 | 87.2 | 94.9 | 97.4 | 39 |
| 17 | 148.1 [133.5, 162.7] | 12.4 [9.5, 15.3] | 12.9 [9.3, 16.5] | 2.8 [−1.9, 7.6] | −6.5 [−11.5, −1.5] | 73.2 | 73.2 | 82.9 | 80.5 | 95.1 | 90.2 | 41 |
| 18 | 164.8 [152.7, 176.9] | 8.9 [7.1, 10.8] | 9.5 [6.8, 12.3] | 4.7 [1.7, 7.6] | −5.0 [−8.6, −1.3] | 86.4 | 81.8 | 95.5 | 93.2 | 97.7 | 95.5 | 44 |
| 19 | 171.1 [157.8, 184.3] | 8.7 [6.2, 11.1] | 8.9 [6.3, 11.5] | 6.3 [3.3, 9.3] | −4.2 [−7.7, −0.6] | 79.1 | 90.7 | 90.7 | 90.7 | 97.7 | 95.3 | 43 |
| 20 | 162.4 [149.5, 175.3] | 8.9 [7.1, 10.8] | 9.7 [7.6, 11.9] | 1.8 [−1.4, 5.0] | −3.5 [−7.0, 0.0] | 86.0 | 79.1 | 93.0 | 93.0 | 100.0 | 97.7 | 43 |
| 21 | 156.5 [139.4, 173.6] | 8.5 [6.1, 10.8] | 12.8 [8.3, 17.4] | −0.7 [−4.3, 2.8] | −9.2 [−14.6, −3.8] | 84.2 | 76.3 | 89.5 | 81.6 | 97.4 | 86.8 | 38 |
| 22 | 168.7 [153.1, 184.2] | 8.7 [6.3, 11.1] | 9.7 [5.5, 14.0] | −3.9 [−7.4, −0.3] | −5.4 [−10.4, −0.4] | 78.4 | 83.8 | 83.8 | 91.9 | 100.0 | 94.6 | 37 |
Abbreviations: ARD, absolute relative differences; BG, blood glucose; CI, confidence interval, FL, FreeStyle Libre; MARD, mean absolute relative difference; MRD, mean relative difference RD, relative differences.