Table 2

Consensus statement recommendations with suggestions for T1D pregnancy

NonpregnantPregnant
Data sufficiency70–80% of possible CGM data70–80% of possible CGM data
Data durationMinimum of 2 weeksNot determined
Time blocks24 h (midnight to midnight)24 h (midnight to midnight)
Nighttime2400–0600 h 2400–0600 or 2300–0700 h
Daytime0600–2400 h0600–2400 or 0700–2300 h
Overall controlMean glucoseMean glucose
% TiR70–180 mg/dL (3.9–10.0 mmol/L)70–140 mg/dL (3.9–7.8 mmol/L)
70–140 mg/dL (3.9–7.8 mmol/L)63–140 mg/dL (3.5–7.8 mmol/L)
Hyperglycemia, level 1>180 mg/dL (10.0 mmol/L)>140 mg/dL (7.8 mmol/L)
Hyperglycemia, level 2>250 mg/dL (13.9 mmol/L)>180 mg/dL (10.0 mmol/L)
High glucose exposureHigh blood glucose indexHigh blood glucose index
Hypoglycemia, level 1<70–54 mg/dL (3.9–3.0 mmol/L)<70–54 mg/dL (3.9–3.0 mmol/L) or 63–50 mg/dL (3.5–2.8 mmol/L)
Hypoglycemia, level 2<54 mg/dL (3.0 mmol/L)<54 mg/dL (3.0 mmol/L) or <50 mg/dL (2.8 mmol/L)
Hypoglycemia, level 3Severe hypoglycemiaSevere hypoglycemia
Low glucose exposureLow blood glucose indexLow blood glucose index
Hypoglycemic event15-min duration15-min duration
Prolonged hypoglycemia120 min120 min
Glycemic variability
 SDNot reported<25 mg/dL suggested
 Coefficient of variation<36% (stable glycemia)<36% (stable glycemia)
For research purposes
 AUCAUC level 1 and 2 hyperglycemiaAUC level 1 and 2 hyperglycemia
AUC level 1 and 2 hypoglycemiaAUC level 1 and 2 hypoglycemia
 Composite glycemic trial outcomesHbA1c or TiR and level 2 hypoglycemiaTiR and level 2 hypoglycemia
 Broader composite outcomesHbA1c or TiR + hypoglycemia + lipids + BP + weight gainTiR + hypoglycemia + gestational weight gain + obstetric/neonatal outcomes
  • Optimal sensor accuracy is considered as MARD ≤10% in pregnant and nonpregnant settings. AUC, area under the curve.