Noninvasive prenatal testing results, n = 810
	Normal results for chromosomes 21, 18, 13 and sex, n = 783 (96.7 %)	High risk of trisomy 21, n = 6 (0.7 %)	High risk of trisomy 18, n = 3 (0.4 %)	High risk og trisomy 13, n = 0	High risk of sex chromosome aberration, n = 5 (0.6 %)	Inconclusive results and failed tests, n = 13* (1.6 %)
High-risk (>1:300 of trisomy 21) after combined first trimester screening, n = 242 (29.9 %)	230 (95.0 %)	4 (1.7 %) (confirmed, n = 3; not confirmed, n = 1)	3 (1.2 %) (confirmed, n = 3)		2 (XYY, no follow-up and monosomy X, confirmed)	3 (1.2 %) (failed tests)
Intermediate-risk (1:700 - 1:300) after combined first trimester screening, n = 568 (70.1 %)	553 (97.4 %) (false negative trisomy 21, n = 1, postnatal blood sample, 46,XX,rob(21;21)(q10;q10))	2 (0.4 %) (confirmed, n = 2)			3 (monosomy X, one not confirmed and one no follow-up and XXY, confirmed)	5 (0.9 %) (failed tests), 5 (0.9 %) (inconclusive results)
						*n = 8, repeated NIPT with normal results; n = 3, invasive diagnostics with normal results; n = 2, no follow-up