. Author manuscript; available in PMC: 2025 Jan 1.

Published in final edited form as: Am J Obstet Gynecol. 2023 Jul 8;230(1):95.e1–95.e10. doi: 10.1016/j.ajog.2023.07.005

Table 3:

Demographic parameters of the nested case control study

Demographic Parameters	Anticoagulation (n=29)	Controls ^a (n=58)
Age (years)	36.5 ± 4.9	34.7 ± 4.9
BMI at sample collection (kg/m²)	27.4 ± 6.2	26.5 ± 7.4
Gestational age at sample collection (weeks)	14.0 ± 4.1	14.0 ± 4.2
Female fetal sex (%)	11 (38%)	22 (38%)
Mean fetal fraction	9.3 ± 5.2	13.6 ± 4.8

Data are mean ± standard deviation, N (%)

^a,

matched for gestational age at sample collection, maternal body mass index at sample

collection, and fetal sex