Table 2.

 Distribution of postpartum haemorrhage after 307 756 Swedish vaginal deliveries (1997-2009) according to maternal characteristics

	Total*	No (%) with haemorrhage	OR (95% CI)
Age (years) at delivery:
<20	8847	300 (3.4)	1.00
20-34	264 294	12 009 (4.5)	1.36 (1.21 to 1.52)
≥35	34 615	1812 (5.2)	1.57 (1.39 to 1.78)
Parity:
Primiparous	136 442	7169 (5.3)	1.00
Multiparous	171 314	6952 (4.1)	0.76 (0.74 to 0.79)
Civil status:
Living with father	273 137	12 467 (4.6)	1.00
Living alone	7861	321 (4.1)	0.89 (0.79 to 1.00)
Unknown	9969	398 (4.0)	0.87 (0.78 to 0.96)
Country of origin:
Scandinavian	284 545	13 120 (4.6)	1.00
Non-Scandinavian	23 118	998 (4.3)	0.93 (0.87 to 1.00)
Highest education (years):
Compulsory (9)	29 894	1158 (3.9)	1.00
Upper secondary (<3)	48 702	2082 (4.3)	1.11 (1.03 to 1.20)
Upper secondary (3)	88 744	4140 (4.7)	1.21 (1.13 to 1.30)
University	139 342	6701 (4.8)	1.25 (1.17 to 1.34)
Smoking in 1st trimester:
Non-smoker	258 791	11 984 (4.6)	1.00
Smoker	31 295	1169 (3.7)	0.80 (0.75 to 0.85)
Height (cm):
<160	27 840	1038 (3.7)	1.00
160-169	157 932	6784 (4.3)	1.16 (1.08 to 1.24)
≥170	102 167	5223 (5.1)	1.39 (1.30 to 1.49)
BMI before pregnancy:
<20	30 910	1235 (4.0)	1.00
20-24	155 186	6972 (4.5)	1.13 (1.06 to 1.20)
≥25	84 421	4029 (4.8)	1.20 (1.13 to 1.29)
Diabetes:
No	306 669	14 065 (4.6)	1.00
Yes	1087	56 (5.2)	1.13 (0.86 to 1.49)
Chronic hypertension:
No	306 530	14 028 (4.6)	1.00
Yes	1226	93 (7.6)	1.71 (1.38 to 2.12)
Coagulopathy:
No	306 713	14 048 (4.6)	1.00
Yes	1043	73 (7.0)	1.57 (1.22 to 2.02)
Fibroids:
No	307 663	14 110 (4.6)	1.00
Yes	93	11 (11.8)	2.79 (1.46 to 5.33)

*All numbers do not add up to total for all covariates because of missing information: BMI 12%; height 9%; smoking 6%; education, country of origin <1%.