Table 1.

Number of available samples and data in the case-control arm

Sample/data	GDM n = 1146			Control n =1066
	Mother n (%)	Father n (%)	Child n (%)	Mother n (%)	Father n (%)	Child n (%)
DNA	1044 (91.1)	910 (79.4)	1046 (91.3)	1013 (95.0)	893 (83.8)	957 (89.8)
Cord plasma			1051 (91.7)			967 (90.7)
Questionnaire	1030 (89.9)	599 (50.5)		935 (87.7)	586 (49.5)
Medical records	1117 (97.5)		1117 (97.5)	1042 (97.7)		1042 (97.7)
Medical Birth Register	1146 (100)			1066 (100)

DNA duo: DNA samples from mother and child; GDM n = 971 (84.7%)/control n = 927 (87.0%).

DNA trio: DNA samples from mother, father and child; GDM n = 846 (73.8%)/control n = 833 (78.1%).

GDM, gestational diabetes mellitus.