Analysis of Pregnancy Outcomes Using the New IADPSG Recommendation Compared with the Carpenter and Coustan Criteria in an Area with a Low Prevalence of Gestational Diabetes

Table 1

Differences in clinical characteristics between the new GDM group, the old GDM group, and NGT group.

	New GDM; Group 1	P; 1 versus 2	Old GDM; Group 2	P; 2 versus 3	NGT; Group 3	P; 1 versus 3
N (%)	160 (2.4)		222 (3.3)		6345 (94.3)
Age (SD)	31.6 (4.7)	0.010	33.3 (7.2)	<0.001	30.9 (4.8)	0.103
BMI (SD)	23.3 (3.7)	0.281	24.1 (4.5)	0.426	23.7 (4.4)	0.510
BMI ≥ 25 kg/m²	27.5%	0.430	35.1%	0.477	30.6%	0.701
BME	17.4%	0.677	19.7%	<0.001	9.5%	<0.001
Multiparous	25.5%	0.272	20.6%	0.109	16.3%	0.003
Primigravid	38.2%	0.309	43.2%	0.102	38.1%	0.276

GDM: gestational diabetes; new GDM group: prior classified normal by old criteria and now GDM according to the new IADPSG criteria; old GDM group: classified GDM according to Carpenter and Coustan criteria (old criteria); NGT: normal glucose tolerance; SD: standard deviation; BME: black or minority ethnic origin.