Table 2

Unadjusted incidence of postpartum haemorrhage (PPH), by characteristics of mother and pregnancy
No. of women in this group No of PPHs in this group % of women suffering PPH
Intended place of birth
Hospital 267,874 2,785 1.04
Home 5,998 23 0.38
Pregnancy risk status*
Medium 73,862 968 1.31
Low 200,010 1,840 0.92
Parity
Primipara 125,963 1,653 1.31
Multipara 147,909 1,155 0.78
Mother’s age at delivery
<20 13,881 111 0.80
20-24 51,640 436 0.84
25-29 93,757 915 0.98
30-34 81,332 903 1.11
35-39 29,031 367 1.26
40+ 4,231 76 1.80
Mother’s ethnic group
Black African 7,516 130 1.73
Black Caribbean 6,587 79 1.20
Mediterranean 6,808 62 0.91
Oriental 4,350 72 1.66
South Asian 34,674 320 0.92
White European 195,498 1,940 0.99
Other 11,064 137 1.24
Missing 7,375 68 0.92
Current baby’s birthweight
Low (<2500g) 5,122 31 0.61
2500g-3999g 241,301 2,195 0.91
4000g+ 27,449 582 2.12
Sex of baby
Boy 140,548 1,306 0.93
Girl 133,324 1,502 1.13
Number of ultrasound scans in pregnancy
0 4,610 51 1.11
1 114,588 1,005 0.88
2 99,368 1,091 1.10
3 35,376 384 1.09
4 10,951 166 1.52
>4 5,748 84 1.46
Missing 3,231 27 0.84
Year of delivery
1988 20,901 159 0.76
1989 21,939 187 0.85
1990 22,311 234 1.05
1991 22,108 189 0.85
1992 22,040 208 0.94
1993 21,077 186 0.88
1994 21,014 189 0.90
1995 20,066 228 1.14
1996 20,950 222 1.06
1997 20,246 239 1.18
1998 20,087 240 1.19
1999 20,267 263 1.30
2000 20,866 264 1.27
Hospital providing care (anonymised)
A 8,620 73 0.85
B 16,969 117 0.69
C 7,958 66 0.83
D 21,167 321 1.52
E 8,177 88 1.08
F 20,041 192 0.96
G 20,784 150 0.72
H 25,066 237 0.95
I 29,819 389 1.30
J 22,954 298 1.30
K 19,940 228 1.14
L 19,389 144 0.74
M 20,832 191 0.92
N 17,078 149 0.87
O 15,078 165 1.09
Time of delivery
00:00–01:59 23,457 251 1.07
02:00–03:59 24,377 191 0.78
04:00–05:59 24,601 213 0.87
06:00–07:59 23,911 204 0.85
08:00–09:59 22,211 234 1.05
10:00–11:59 23,155 211 0.91
12:00–13:59 22,871 246 1.08
14:00–15:59 22,105 250 1.13
16:00–17:59 21,594 253 1.17
18:00–19:59 21,829 255 1.17
20:00–21:59 21,245 241 1.13
22:00–23:59 22,516 259 1.15

* Pregnancy risk status was included in the multivariable analysis via the inclusion of a number of individual risk factors as model covariates (see ‘Definitions’ section and Table 3). In Table 2, however, it is shown as a single summary variable.

Nove et al.

Nove et al. BMC Pregnancy and Childbirth 2012 12:130   doi:10.1186/1471-2393-12-130

Open Data