Table 3.

Distribution of structural defects with different NT thickness subgroups.

NT (mm)	Total	Structural defects
		Hydrops	Cardiac defects	Urinary anomalies	Facial defects	Abnormal DV blood flow	CNS anomalies	Omphalocele	Skeletal anomalies	GI anomalies
[95th centile-2.5)	150	1 (0.7)	1 (0.7)	4 (2.8)	1 (0.7)	0	2 (1.4)	0	0	0
[2.5–3.0)	51	0	1 (2.0)	2 (4.0)	0	1 (2.0)	0	0	0	1 (2.0)
[3.0–3.5)	23	1 (4.3)	0	1 (4.3)	2 (8.6)	0	0	0	1 (4.3)	0
[3.5–4.5)	15	0	1 (6.7)	0	0	0	0	0	0	0
[4.5–5.5)	8	3 (37.5)	2 (25.0)	0	1 (12.5)	1 (12.5)	2 (25.0)	1 (12.5)	0	1 (12.5)
[5.5–6.5)	2	0	2 (100.0)	0	1 (50.0)	0	0	0	1 (50.0)	0
≥ 6.5	15	13 (86.7)	1 (6.7)	0	2 (13.4)	4 (26.8)	1 (6.7)	3 (20.0)	1 (6.7)	0

[value a, value b) meant that value a was included, while value b was excluded. CNS, central nervous system.