Use of the National Diabetes Data Group and the Carpenter-Coustan criteria for assessing gestational diabetes mellitus and risk of adverse pregnancy outcome

Table 1 Characteristics of the study population

	Negative screening	False-positive screening	CC-only-GDM (not meeting NDDG)	NDDG-GDM	P
Number of observations	9002	1776	251	457
Number of clusters	7640	1699	249	434
Nulliparous status
Yes	4627 (51.4)	936 (52.7)	115 (45.8)	212 (46.4)	0.03^a
No	4375 (48.6)	840 (47.3)	136 (54.2)	245 (53.6)
Maternal age (years)	29.0 (28.9–29.1)	30.6 (30.4–30.8)	32.1 (31.5–32.6)	32.5 (32.0–32.9)	<0.001^b
BMI at delivery (kg/m²)	26.7 (26.6–26.8)	27.2 (27.0–27.4)	28.2 (27.8–28.7)	28.1 (27.7–28.5)	<0.001^b
50-g GCT levels (mg/dL)	110.4 (110.0–110.7)	158.0 (157.3–158.7)	164.8 (162.4–167.3)	179.7 (177.0–182.3)	<0.001^b

Data are presented as means (95 % confidence interval) or n (%)
CC Carpenter-Coustan criteria, GDM gestational diabetes mellitus, NDDG National Diabetes Data Group criteria; BMI body mass index, GCT glucose challenge test
^aThe Rao-Scott chi-square test was performed using SAS SURVEYFREQ produces
^bANOVA was performed using SAS SURVEYREG produces the Wald F test with their corresponding p-values

ISSN: 1471-2393