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Table 2 Odds ratio of stillbirth

From: Abnormal placental perfusion and the risk of stillbirth: a hospital-based retrospective cohort study

Characteristics

All (56 cases)

Unexplained (48 cases)

Raw odds ratio (95% CI)

P value

Adjusted odds ratio (95% CI)

P value

Raw odds ratio (95% CI)

P value

Adjusted odds ratio (95% CI)

P value

Placental perfusion

 Normal

1.0

 

1.0

 

1.0

 

1.0

 

 Insufficiency

4.8 (2.5–9.1)

< 0.001

4.2 (2.2–8.0)

< 0.001

5.3 (2.7–10.5)

< 0.001

4.6 (2.3–9.2)

< 0.001

 NA

1.7 (0.9–3.2)

0.10

1.6 (0.9–3.1)

0.13

1.6 (0.8–3.3)

0.16

1.6 (0.8–3.1)

0.21

Maternal age at delivery (years)

  < 25

1.0

 

1.0

 

1.0

 

1.0

 

 25–34

0.9 (0.3–3.0)

0.91

0.9 (0.3–2.9)

0.86

0.8 (0.2–2.5)

0.67

0.7 (0.2–2.4)

0.60

  ≥ 35

1.0 (0.3–4.1)

0.98

0.8 (0.2–3.4)

0.77

1.0 (0.3–4.1)

0.98

0.8 (0.2–3.3)

0.71

Residence

 Local

1.0

 

1.0

 

1.0

 

1.0

 

 Nonlocal

1.1 (0.6–2.0)

0.74

1.1 (0.6–2.0)

0.81

1.1 (0.6–2.1)

0.75

1.1 (0.5–2.1)

0.85

Parity

 Nulliparous

1.0

 

1.0

 

1.0

 

1.0

 

 Pluriparous

1.2 (0.6–2.4)

0.57

1.3 (0.6–2.7)

0.51

1.3 (0.6–2.7)

0.49

1.3 (0.6–2.9)

0.48

Assisted conception

 No

1.0

 

1.0

 

1.0

 

1.0

 

 Yes

1.0 (0.1–7.2)

0.99

0.9 (0.1–6.9)

0.94

1.2 (0.2–8.4)

0.88

1.0 (0.1–7.8)

0.98

Gestational diabetes mellitus

 No

1.0

 

1.0

 

1.0

 

1.0

 

 Yes

1.1 (0.4–2.7)

0.89

0.9 (0.4–2.4)

0.87

1.3 (0.5–3.2)

0.62

1.1 (0.4–2.8)

0.88

Preeclampsia

 No

1.0

 

1.0

 

1.0

 

1.0

 

 Yes

4.5 (2.4–8.6)

< 0.001

3.8 (2.0–7.4)

< 0.001

4.9 (2.5–97)

< 0.001

4.0 (2.0–8.1)

< 0.001

Sex

 Male

1.0

 

1.0

 

1.0

 

1.0

 

 Female

1.9 (1.1–3.3)

0.020

1.9 (1.1–3.3)

0.020

1.9 (1.1–3.5)

0.028

2.0 (1.1–3.5)

0.027