The relative importance of maternal body mass index and glucose levels for prediction of large-for-gestational-age births

Table 2 Demographic characteristics of development sample and validation sample groups

Characteristic	Development sample (n = 5487)		Validation sample (n = 5487)		p ^a
Maternal age, years	29.7	5.1	29.6	5.1	0.88
< 20	121	(2.2)	125	(2.3)	0.80
20–34	4415	(80.5)	4426	(80.7)	0.79
≥ 35	951	(17.3)	936	(17.1)	0.71
Parity
1	2688	(49.0)	2681	(48.9)	0.90
2–3	2463	(44.9)	2465	(44.9)	0.97
≥ 4	336	(6.1)	341	(6.2)	0.84
Smoker
No	4727	(86.1)	4722	(86.1)	0.89
Yes	625	(11.4)	623	(11.4)	0.96
Maternal BMI, kg/m²	24.9	4.5	24.7	4.3	0.089
< 18.5	102	(1.9)	92	(1.7)	0.47
18.5–24	2928	(53.4)	3015	(54.9)	0.095
25.0–29.9	1303	(23.7)	1343	(24.5)	0.37
30–34.9	440	(8.0)	424	(7.7)	0.57
≥ 35	236	(4.3)	175	(3.2)	0.002
Gestational age, weeks	39.7	1.7	39.7	1.7	0.62
< 37	304	(5.5)	281	(5.1)	0.33
37–41 + 6	4875	(88.8)	4889	(89.1)	0.67
≥ 42 + 0	308	(5.6)	317	(5.8)	0.71
Weight for gestational age
SGA	166	(3.0)	131	(2.4)	0.04
AGA	5044	(91.9)	5061	(92.2)	0.58
LGA	277	(5.0)	295	(5.4)	0.44
Infant gender
Male	2839	(51.7)	2888	(52.6)	0.35
Female	2648	(48.3)	2599	(47.4)	0.35

Both groups contain only information where all information was available. Data are n (%) or mean (SD)
AGA adequate for gestational age, BMI body mass index, LGA large-for-gestational-age, SGA small-for-gestational-age
^ap-values obtained by chi-squared test (1 DF) for class variables and by Mann-Whitney U-test for continuous data

ISSN: 1471-2393