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Table 1 Baseline characteristics of women with postpartum haemorrhage (N = 20,021)

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

Variable Number Percent
Cause of haemorrhage
 Uterine atony 12,761 63.7
 Surgical trauma/tears 3681 18.4
 Placenta praevia/accreta 1875 9.4
 Other/Unknown 1700 8.5
 Missing 4 0.02
Age (years)
 < 20 1021 5.1
 20–29 10,410 52.0
 30–39 7902 39.5
 ≥40 681 3.4
 Missing 7 0.03
 Mean (SD) 28.3 (5.7)  
Geographic Region
 Africa 12,718 63.5
 Asia 6173 30.8
 Europe and Americas 1130 5.6
Delivery in study hospital
 Yes 17,590 87.9
 No 2428 12.1
 Missing 3 0.01
Uterotonic prophylaxis given
 Yes 19,268 96.2
 No 269 1.3
 Missing 484 2.4
Type of delivery
 Vaginal 14,191 70.9
 Caesarean 5825 29.1
 Missing 5 0.02
Full delivery of placenta
 Yes 18,067 90.2
 No 1951 9.7
 Missing 3 0.01
Systolic Blood Pressure (mmHg)
 ≤70 1532 7.7
 71–90 5927 29.6
 > 90 12,557 62.7
 Missing 5 0.02
 Mean (SD) 100.8 (22.7)  
Estimated volume of blood loss (mL)
 ≤ 1000 10,403 52.0
 1001–1500 5704 28.5
 > 1500 3911 19.5
 Missing 3 0.01
 Mean (SD) 1226.4 (617.8)  
Clinical signs of haemodynamic instability
 No 8194 40.9
 Yes 11,826 59.1
 Missing 1 < 0.01