Table 2.

Copy number variant (CNV) detection rates according to nuchal translucency thick (NT) in euploid fetuses

NT (mm)	N (%)	CMA				Detection rate (%)	χ2	P
		Pathogenic CNVs	Likely pathogenic CNVs	VOUS CNVs	Total
2.5–2.9	76	0	1	6	7	1.32 (1/76)
3.0–3.4	62	2	0	3	5	3.23 (2/62)	0.586	0.424
3.5–4.4	41	1	1	1	3	4.88 (2/41)	1.353	0.281
4.5–5.4	11	0	0	0	0	0 (0/11)	0.146	0.874
≥5.5	4	0	0	1	1	0 (0/4)	0.053	0.950
Total	194	3 (1.55%)	2 (1.03%)	11 (5.67%)	16