Table 1.
Characteristics and rates of severe PPH among women delivering at Oslo University Hospital between 2008–2017
| 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) |
Bold text indicates statistically significant results (P < 0.05)
PPH, postpartum haemorrhage; CI, confidence interval; IRR, crude incidence rate ratio
1Number of deliveries at Oslo University Hospital provided from the Medical Birth Registry of Norway
²One women with missing information from total number of deliveries