Table 3

CGM measures among women in CONCEPTT using insulin pump and MDI during pregnancy

Pump users (N = 98)
10–11 weeks’ gestation34–35 weeks’ gestation
CGM (N = 50)Control (N = 48)CGM (N = 35)Control (N = 37)
Mean glucose, mg/dL131 ± 22133 ± 22121 ± 18126 ± 16
% TiR*53 ± 1254 ± 1466 ± 1362 ± 14
% Time >140 mg/dL39 (26–47)39 (29–49)27 (20–37)32 (27–41)
% Time <63 mg/dL8 (3–13)6 (3–10)3 (1–7)4 (2–7)
Hypoglycemia episodes**0.8 (0.6–1.0)0.7 (0.5–0.9)0.5 (0.3–0.8)0.5 (0.4–0.7)
Coefficient of variation, %42 (37–47)40 (36–46)31 (28–37)35 (29–40)
SD, mmol/L3.0 (2.5–3.4)3.1 (2.5–3.6)2.2 (1.8–2.5)2.4 (2.0–3.0)
MDI users (N = 116)
10–11 weeks’ gestation34–35 weeks’ gestation
CGM (N = 57)Control (N = 59)CGM (N = 42)Control (N = 40)
Mean glucose, mg/dL131 ± 22139 ± 18121 ± 14126 ± 7.0
% TiR*50 ± 1350 ± 1369 ± 1361 ± 17
% Time >140 mg/dL39 (30–49)41 (34–51)26 (17–36)31 (24–39)
% Time <63 mg/dL8 (5–17)6 (2–12)3 (1–6)5 (2–9)
Hypoglycemia episodes**0.8 (0.6–1.0)0.7 (0.3–0.9)0.5 (0.3–0.8)0.5 (0.3–0.8)
Coefficient of variation, %43 (39–48)43 (36–49)33 (28–37)34 (29–38)
SD, mmol/L3.2 (2.7–3.6)3.2 (2.7–3.9)2.2 (1.8–2.5)2.3 (2.0–2.8)
  • Data are mean ± SD and median (interquartile range) as appropriate. These data are adapted from the CONCEPTT results publication (22).

  • *TiR for T1D pregnancy was defined as 63–140 mg/dL (3.5–7.8 mmol/L).

  • **Hypoglycemia episodes were defined as CGM levels <63 mg/dL for at least 20 min. Distinct episodes were counted only if separated by at least 30 min.