Table 3 Characteristics of all pregnant women with placenta previa according to the amount of the postpartum hemorrhage (PPH)

Maternal age

  > 35 years

14

(50.0%)

140

(45.6%)

0.70

  < 35 years

14

(50.0%)

167

(54.4%)

Gestational age at delivery

  > 37 weeks

18

(64.3%)

195

(63.5%)

1.00

  < 37 weeks

10

(35.7%)

112

(36.5%)

Parity

 Primipara

9

(32.1%)

161

(52.6%)

0.048

 Multipara

19

(67.9%)

146

(47.4%)

In vitro fertilization pregnancy

 Yes

3

(10.7%)

40

(13.0%)

1.00

 No

25

(89.3%)

267

(87.0%)

Tocolytic agent use

 Yes

13

(46.4%)

125

(40.7%)

0.55

 No

15

(53.6%)

182

(59.3%)

Warning bleeding^b

 Yes

10

(35.7%)

87

(28.3%)

0.39

 No

18

(64.3%)

220

(71.7%)

Prior CS

 Yes

14

(30.0%)

30

(9.8%)

 < 0.01

 No

14

(0.0%)

277

(90.2%)

The mode of cesarean section

 Emergency

6

(21.4%)

67

(21.8%)

1.00

 Elective

22

(78.6%)

240

(78.2%)

The classification of placenta previa

 Major previa^c

25

(89.3%)

130

(42.4%)

 < 0.01

 Minor previa^d

3

(10.7%)

177

(57.6%)

Main location of placenta

 Anterior wall

8

(28.6%)

32

(10.4%)

0.01

 Posterior wall

20

(71.4%)

275

(89.6%)

Placenta accreta spectrum

 Yes

6

(21.4%)

5

(1.6%)

 < 0.01

 No

22

(78.6%)

302

(98.4%)

Prior endometrial curettage

 Yes

6

(21.4%)

85

(27.7%)

0.66

 No

22

(78.6%)

222

(72.3%)

Retained products of conception

 Yes

14

(50.0%)

10

(3.3%)

 < 0.01

 No

14

(50.0%)

297

(96.7%)