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Table 2 Risk factors associated with placental abruption

From: Frequency, risk factors and feto-maternal outcomes of abruptio placentae in Northern Tanzania: a registry-based retrospective cohort study

Risk factors

Placental abruption (N = 112; 0.3 %)

No abruption (N =39,881; 99.7 %)

Unadjusted OR (95 % CI)

Adjusted OR (95 % CI)a

Chronic hypertension

  

4.5 (1.6–13.2)

4.1 (1.3–12.8)

 Yes

3 (1.1)

269 (98.9)

  

 No

109 (0.3)

39,612 (99.7)

  

Preeclampsia/eclampsiab

  

2.5 (1.6–5.2)

2.1 (1.1–4.1)

 Yes

9 (0.6)

1622 (99.4)

  

 No

103 (0.3)

38,259 (99.7)

  

Multiple gestations

 Yes

106 (0.28)

37,664 (99.7)

1.0 (0.5–2.3)

0.8 (0.3–1.9)

 No

6 (0.27)

2217(99.7)

  

Previous caesarean -section

  

1.5 (1.2–4.8)

1.3 (1.2–4.2)

 Yes

22 (0.3)

6947 (99.7)

  

 No

90 (0.12)

32,934 (99.8)

  

Previous abruptio placentaec

  

3.8 (2.3–6.4)

2.3 (1.8–3.4)

 Yes

49 (0.7)

6658 (99.3)

  

 No

63 (0.19)

33,223 (99.8)

  

Antenatal care visits

  

1.6 (1.2–2.6)

1.3 (1.1–2.4)

 <4

53 (0.4)

13,315 (99.6)

  

 ≥4

59 (0.2)

26,566 (99.8)

  

Gravidity

  

2.2 (1.4–3.6)

2.1 (1.2–3.5)

 Multigravida

90 (0.3)

27,766 (99.7)

  

 Primigravida

22 (0.18)

12,115 (99.8)

  

Parity

  

1.7 (1.4–10.5)

1.4 (1.2–8.6)

 ≥2

65 (0.36)

17,836 (99.6)

  

 <2

47 (0.2)

22,045 (99.8)

  

Sex of the baby

 Male

62 (0.3)

20,580 (99.7)

1.2 (0.9–1.7)

1.03(0.7–1.5)

 Female

50 (0.25)

19,301 (99.75)

  
  1. aAdjusted for maternal age, maternal education level, marital status, area of residence
  2. bAdjusted for previous abruptio placentae and chronic hypertension
  3. cAdjusted for previous caesarean section delivery