Table 1.

Relationship between analytic percentiles and multiples of the median (FASTER trial).

Percentile	PAPP-A (MoM)	Free β-hCG (MoM)
1st	$0.28$	0.24
5th	$0.42$	0.35
10th	$0.52$	0.44
90th	$2.04$	2.94
95th	$2.51$	3.91
99th	$3.73$	6.56

MoM: multiples of median; β-hCG: free beta-human chorionic gonadotropin; PAPP-A: pregnancy-associated plasma protein-A.