Characteristic

Predictable placental abruption

(n = 67)

Unpredictable placental abruption

(n = 33)

PR

Vaginal bleeding

35 (52.24%)

5 (15.15%)

P < 0.005

Abdominal pain

14 (20.90%)

14 (42.42%)

Uterine tenderness, uterine tetanic contractions, or hypertonic uterus

5 (7.46%)

4 (12.12%)

Bloody amniotic fluid

12 (17.91%)

6 (18.18%)

P > 0.05

Fetal heart rate abnormalities

13 (19.40%)

15 (45.45%)

Retroplacental blood clot by ultrasound

54 (80.60%)

0 (0.00%)

Extent of abruption

<30%

30 - <50%

50 - <80%

80 - 100%

2 (2.98%)

4 (5.97%)

27 (40.30%)

34 (50.75%)

22 (66.67%)

8 (24.24%)

2 (6.06%)

1 (3.03%)