Table 5.

Continuous Glucose Monitoring System Accuracy During Exercise Challenge (n = 70)

Condition	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]
Exercise condition	1190	87.6	95.1	99.7	99.9	8.3 (7.5–9.3)
Nonexercise condition	15,463	85.6	93.2	97.9	99.3	8.8 (8.1–9.3)

In-clinic accuracy is assessed compared with venous YSI reference measurement. The effect of exercise on accuracy was evaluated by instructing participants with a single sensor to perform upper arm exercises for 30 min. Results compared with a nonexercise condition are reported. 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.