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Table 3 Adjusted odds ratios for risk factors of hysterectomy in women with postpartum haemorrhage

From: Risk factors for peripartum hysterectomy among women with postpartum haemorrhage: analysis of data from the WOMAN trial

Variable

Model 1a

 

Model 2b

 

AOR (95% CI)c

P-value

AOR (95% CI)c

P-value

Cause of haemorrhage

 Uterine atony

1

< 0.001

1

< 0.001

 Surgical trauma/tears

1.42 (1.16–1.73)

 

1.21 (0.98–1.50)

 

 Placenta praevia/accreta

3.17 (2.66–3.79)

 

2.25 (1.85–2.74)

 

 Other/Unknown

1.34 (1.03–1.74)

 

0.97 (0.73–1.28)

 

Age (years)

 < 20

1

< 0.001

1

< 0.001

 20–29

1.62 (0.90–2.93)

 

1.47 (0.80–2.72)

 

 30–39

3.96 (2.20–7.14)

 

3.33 (1.82–6.12)

 

 ≥40

7.59 (4.03–14.29)

 

5.89 (3.04–11.38)

 

Geographic region

 Africa

1

0.01

1

< 0.001

 Asia

1.23 (0.91–1.66)

 

2.16 (1.52–3.08)

 

 Europe and Americas

0.45 (0.23–0.89)

 

0.69 (0.32–1.47)

 

Delivery in study hospital

 Yes

1

< 0.001

1

0.06

 No

1.60 (1.25–2.07)

 

0.77 (0.59–1.01)

 

Uterotonic prophylaxis given

 Yes

1

< 0.001

1

< 0.001

 No

2.68 (1.77–4.06)

 

2.57 (1.62–4.09)

 

Type of delivery

 Vaginal

1

< 0.001

1

< 0.001

 Caesarean

4.26 (3.60–5.04)

 

2.32 (1.92–2.80)

 

Systolic blood pressure (mmHg)

 ≤70

  

2.26 (1.79–2.87)

< 0.001

 71–90

  

1.68 (1.40–2.01)

 

 > 90

  

1

 

Estimated volume of blood loss (mL)

 ≤ 1000

  

1

< 0.001

 1001–1500

  

2.89 (2.19–3.83)

 

 > 1500

  

12.88 (9.78–16.95)

 

Clinical signs of haemodynamic instability

 No

  

1

< 0.001

 Yes

  

3.50 (2.74–4.47)

 
  1. aModel 1: cause of haemorrhage, age, geographic region, delivery in study hospital, uterotonic prophylaxis given and type of delivery
  2. bModel 2: model 1 plus systolic blood pressure, estimated volume of blood loss and clinical signs of haemodynamic instability
  3. cAOR: Adjusted odds ratio; CI: Confidence interval
  4. P-values obtained from likelihood ratio test