Table 3 Risk factors for developing abnormally adherent placenta

Previous cesarean section

10.22

(0.53-194.05)

0.06

 No^a

5 (100%)

0 (0.0%)

 Yes

28 (51.9%)

26 (48.1%)

≥ 2 previous cesarean section

5.21

(1.03-26.42)

0.04

 No^a

10 (83.3%)

2 (16.7%)

 Yes

23 (48.9%)

24 (51.1%)

Placenta previa

14.28

(1.71-119.12)

0.003

 No^a

12 (92.3%)

1 (7.7%)

 Yes

21 (45.7%)

25 (54.3%)

Previous cesarean section and placenta previa

16.25

(1.95-135.01)

0.001

 No^a

13 (92.8%)

1 (7.2%)

 Yes

20 (44.4%)

25 (55.6%)

Age (years)

3.50

(1.06-11.52)

0.03

 < 35^a

15 (75%)

5 (25%)

 ≥ 35

18 (46.2%)

21 (53.8%)

Previous evacuation

3.12

(1.03-9.45)

0.04

 No^a

25 (65.8%)

13 (34.2%)

 Yes

8 (38.1%)

13 (61.9%)

Grand parity

0.81

(0.28-2.36)

0.70

 No^a

20 (51.3%)

17 (48.8%)

 Yes

13 (58.3%)

9 (41.7%)

Gestational age at delivery (weeks)

1.39

(0.48-4.02)

0.54

 ≥37^a

14 (60.9%)

9 (39.1%)

 <37

19 (52.8%)

17 (47.2%)