. 2020 Sep 25;2020:3854630. doi: 10.1155/2020/3854630

Table 2.

Univariate analysis of maternal DM and offspring CHD.

Maternal DM	Control group (n = 620)	Case group (n = 620)	Univariable analysis	Unadjusted OR (95% CI)
GDM during this pregnancy
No	592 (95.5%)	552 (89.0%)	χ ² = 18.065; P ≤ 0.001	1
Yes	28 (4.5%)	68 (11.0%)	χ ² = 18.065; P ≤ 0.001	2.61 (1.65-4.11)∗
GDM during previous pregnancy experience
No	595 (96.0%)	550 (88.7%)	χ ² = 23.084; P ≤ 0.001	1
Yes	25 (4.0%)	70 (11.3%)	χ ² = 23.084; P ≤ 0.001	3.03 (1.89-4.85)^∗
PGDM in the 3 months before this pregnancy
No	603 (97.3%)	557 (89.8%)	χ ² = 28.274; P ≤ 0.001	1
Yes	17 (2.7%)	63 (10.2%)	χ ² = 28.274; P ≤ 0.001	4.01 (2.32-6.94)^∗

DM: diabetes mellitus; CHD: congenital heart disease; GDM: gestational diabetes mellitus; PGDM: pregestational diabetes mellitus; OR: odds ratio; CI: confidence interval. ^∗Statistically significant (a = 0.05).