Table 3. Comparison among FGM and SMBG.

Clarke error grid analysis	Accurate %	Acceptable (benign) %	Erroneous %	Pearson correlation + linear regression FGM x SMBG
Overall (n = 26 patients/1,705 measurements)	96.60	0.76	2.63	0.90 (<0.001) 0.87 {0.85-0.89}
Glucose range < 70 mg/dL (N = 25 patients/146 measurements)	95.38	0.51	4.10	0.16 (=0.02) 0.65 {0.08-1.23}
Glucose range 70-180 mg/dL (N = 26 patients/813 measurements)	97.57	0.11	2.30	0.68 (<0.001) 0.82 {0.76-0.88}
Glucose range > 180 mg/dL (N = 26 patients/746 measurements)	98.12	1.73	0.15	0.74 (<0.001) 0.75 {0.70-0.80}

FGM: flash glucose monitoring (FreeStyle Libre); SMBG: self-monitoring blood glucose. [97.5% CI], (p value).