Table 3.

Continuous Glucose Monitoring System Accuracy and Stability by Clinic Visit

YSI glucose, range (mg/dL)	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]
Day 1	1737	77.0	87.3	96.1	98.4	10.5 (9.4–11.6)
Day 30	5385	89.0	94.4	98.1	99.2	8.0 (6.8–8.8)
Day 60	5016	87.9	95.1	98.8	99.7	8.2 (7.3–8.9)
Day 90	4515	82.7	92.5	97.9	99.6	9.6 (8.6–10.5)

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.