Table 6 Characteristics of different graded in patients with SCH (n = 559).

From: Association between first-trimester subchorionic hematoma and pregnancy loss before 20 weeks of gestation in singleton pregnancies

Characteristics

Small SCH (n = 143)

Medium SCH (n = 314)

Large SCH (n = 102)

P-value

Age, y

29.4 ± 4.27

29.4 ± 4.35

29.6 ± 3.55

0.848

Basal BMI

21.9 ± 3.60

21.6 ± 3.28

20.9 ± 2.66

0.020

Primipara, n

82(57.3%)

189(60.2%)

56(54.9%)

0.609

Prior miscarriage/abortion

73(51.0%)

122(38.9%)

39(38.2%)

0.035

Intramural leiomyomas ≥ 4 cm

7(4.9%)

5(1.6%)

1(1.0%)

0.057

Vaginal bleeding

69(48.3%)

108(34.4%)

37(36.3%)

0.017

SCH lasted for the second trimester

1(0.7%)

14(4.5%)

29(28.4%)

 < 0.001

Gestational age (week) at diagnosis (median, IQR)

7.3(6.7–8.3)

7.4(6.7–8.4)

7.0(6.0–7.8)

0.164

Gestational age (week) at SCH peak (median, IQR)

7.4(7.0–8.4)

8.0(7.1–9.0)

8.4(7.4–10.0)

 < 0.001

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