Incidence of postpartum haemorrhage defined by quantitative blood loss measurement: a national cohort

Table 1 The incidence of moderate and severe postpartum haemorrhage in Wales in 2017

Volume of postpartum haemorrhage	Number of episodes of postpartum haemorrhage in Wales^a	Incidence (95% CI) per 100 maternities in Wales^a	Incidence of PPH per 100 maternities in the 12 maternity units^a in Wales Median (IQR)
> 1000 mL	2688	8.6 (8.3–8.9)	8.6 (7.8–9.6)
> 1500 mL	1039	3.3 (3.1–3.5)	3.6 (2.7–4.0)
> 2000 mL	404	1.3 (1.2–1.4)	1.5 (1.0–1.7)

The incidence of bleeds > 2000 mL and > 1500 are subgroups of > 1000 mL. There were 1649 bleed between > 1000 and 1500 mL and 635 between > 1500 and 2000 mL. ^aData include midwifery and obstetrician-led care from all 12 maternity units in Wales. The incidence (95% CI) is for all maternities in Wales with the denominator n = 31,341. The incidence at each of the 12 obstetric units is described by median and interquartile range (IQR) to describe the variation between hospitals

ISSN: 1471-2393