Table 2.
Rates and estimated annual percentage change of severe PPH at Oslo University Hospital (n = 96 313 total deliveries)
| n | Rate per 1000 deliveries (95% CI) |
Estimated annual percentage change (95% CI)1, P value | Age-adjusted estimated annual percentage change (95% CI)12, P value | |
|---|---|---|---|---|
| Severe PPH | 2621 | 27.2 (26.2–28.3) | 6.0 (4.6–7.5), < 0.001 | 5.9 (4.4–7.4), < 0.001 |
| Blood transfusion | 2034 | 21.1 (20.2–22.1) | 6.3 (4.7-8.0), < 0.001 | 6.2 (4.6–7.8), < 0.001 |
| Transfusion ≥ 4 units of blood products | 679 | 7.01 (6.5–7.6) | 8.4 (5.5–11.3), < 0.001 | 8.0 (5.2–10.9), < 0.001 |
| Transfusion ≥ 6 units of red blood cells | 181 | 1.9 (1.6–2.2) | 4.5 (0.8–10.0), 0.10 | 3.9 (1.3–9.4), 0.14 |
| Maternal near miss | 211 | 2.2 (1.9–2.6) | 4.6 (0.3–9.7), 0.06 | 4.0 (0.8–9.1), 0.11 |
PPH, postpartum haemorrhage; CI, confidence interval
1Estimated annual percentage change, assuming a linear trend based on Poisson regression
2Adjusted for age by including age in the model (< 30, 30–39, 40 + years)