Skip to main content

Table 1 Sample characteristics of the study population (n = 208)

From: A fetal fraction enrichment method reduces false negatives and increases test success rate of fetal chromosome aneuploidy detection in early pregnancy loss

Characteristics

All

Male fetus

Female fetus

Sample size

208

102

106

Maternal age (year)

30 (27 to 32)

30 (27 to 32)

29 (23 to 32)

BMI (kg/m2)

21.4 (20.1 to 23.2)

21.3 (20.1 to 23.2)

22.0 (20.5 to 24.4)

Gestational age (week)

8 (7 to 10)

8 (7 to 9.3)

10 (8.5 to 11.5)

Uniquely mapped reads (Mb)*

2.8 (2.3 to 3.5)

2.8 (2.3 to 3.5)

2.4 (1.9 to 3.7)

Average size of cfDNA (bp)

129 (124 to 135)

129 (124 to 136)

127 (123 to 132)

Fetal fraction with enrichment (%)

NA

15.7 (10.4 to 25)

NA

Fetal fraction without enrichment (%)

NA

6.1 (4.1 to 8.6)

NA

Foldchange of fetal fraction

NA

2.8 (2.1 to 3.4)

NA

  1. *The uniquely mapped reads are the result of size selection NIPS