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Table 1 Characteristics and rates of severe PPH among women delivering at Oslo University Hospital between 2008–2017

From: Exploring trends of severe postpartum haemorrhage: a hospital-based study

 

Severe PPH

n (%)

Deliveries1

n (%)

Rate of severe PPH per 1000 deliveries

(95% CI)

IRR (95% CI)

Total

2621

96 313

27.2 (26.2–28.3)

 

Age at delivery²

    

< 30 years

747 (28.5)

29 315 (30.4)

25.5 (23.7-27-4)

1.0 (ref)

30–39 years

1642 (62.6)

61 762 (64.1)

26.6 (25.3–27.9)

1.04 (0.96–1.14)

≥ 40 years

232 (8.9)

5235 (5.5)

44.3 (38.8–50.4)

1.74 (1.5–2.02)

Parity

    

Nulliparous

1569 (59.9)

47 682 (49.5)

32.9 (31.3–34.6)

1.52 (1.39–1.66)

Para 1

727 (27.7)

33 549 (34.8)

21.7 (20.1–23.3)

1.0 (ref)

Para 2 +

325 (12.4)

15 082 (15.7)

21.6 (19.3–24.0)

0.99 (0.87–1.13)

Multiple pregnancy

    

No

2406 (91.8)

94 162 (97.8)

25.6 (24.5-26.59)

1.0 (ref)

Yes

215 (8.2)

2151 (2.2)

10.0 (87.0-114.2)

3.91 (3.43–4.47)

Previous caesarean section

    

No

2282 (87.1)

86 779 (90.1)

26.3 (25.2–27.4)

1.0 (ref)

Yes

339 (12.9)

9534 (9.9)

35.6 (31.9–39.6)

1.34 (1.2–1.51)

Mode of delivery

    

Vaginal delivery

1272 (48.5)

65 548 (68.1)

19.4 (18.4–20.5)

1.0 (ref)

Operative Vaginal delivery

595 (22.7)

11 490 (11.9)

51.8 (47.7–65.1)

2.71 (2.46–2.99)

Caesarean section

754 (28.8)

19 275 (20.0)

39.1 (36.4–42.0)

2.02 (1.85–2.21)

-elective

214 (8.2%)

   

-in-labor

540 (20.6%)

   

Placenta previa

    

No

2503 (95.5)

95 942 (99.6)

25.8 (24.8–26.9)

1.0 (ref)

Yes

118 (4.5)

371 (0.4)

318.1 (263.3-380.9)

12.2 (9.95–14.9)

Year of delivery

    

2008

159

9270

17.1 (14.6–20.0)

1.0 (ref)

2009

200

9444

21.2 (18.3–24.3)

1.23 (1.00-1.52)

2010

249

9533

26.1 (23.0-29.6)

1.52 (1.25–1.86)

2011

225

9297

24.2 (21.1–27.6)

1.41 (1.15–1.73)

2012

277

9848

28.1 (24.9–31.6)

1.64 (1.35–1.99)

2013

299

9956

30.3 (26.7–33.6)

1.75 (1.44–2.12)

2014

294

9898

29.7 (26.4–33.3)

1.73 (1.43–2.12)

2015

271

9695

28.0 (24.7–31.5)

1.63 (1.34–1.98)

2016

315

9817

31.8 (28.4–35.5)

1.87 (1.55–2.26)

2017

332

9555

34.2 (30.7–38.1)

2.03 (1.68–2.45)

  1. Bold text indicates statistically significant results (P < 0.05)
  2. PPH, postpartum haemorrhage; CI, confidence interval; IRR, crude incidence rate ratio
  3. 1Number of deliveries at Oslo University Hospital provided from the Medical Birth Registry of Norway
  4. ²One women with missing information from total number of deliveries