Table 2.
Atonic postpartum hemorrhage by region and hospital volume, British Columbia, 2000-2009
|
Region (by health authority of mother's residence) |
All years |
Rate per 100 deliveries by year |
2009 vs. 2000 |
P for trend2 |
|||||
|---|---|---|---|---|---|---|---|---|---|
| n1 | rate | 2000 | 2001 | 2008 | 2009 | RR | 95% CI | ||
| Fraser |
8340 |
5.2 |
5.0 |
4.9 |
6.6 |
6.0 |
1.19 |
1.09-1.30 |
<0.001 |
| Interior |
2769 |
4.7 |
3.9 |
3.4 |
5.8 |
7.0 |
1.81 |
1.54-2.11 |
<0.001 |
| Northern |
1694 |
4.9 |
5.2 |
4.8 |
5.6 |
4.1 |
0.79 |
0.64-0.97 |
0.03 |
| Vancouver Coastal |
6995 |
7.1 |
5.4 |
6.0 |
8.8 |
8.3 |
1.55 |
1.39-1.72 |
<0.001 |
| Vancouver Island |
2206 |
3.7 |
3.8 |
3.8 |
4.4 |
4.9 |
1.29 |
1.09-1.53 |
<0.001 |
|
Hospital Volume (by deliveries per year) |
|
|
|
|
|
|
|
|
|
| <500 |
2537 |
4.5 |
5.0 |
4.1 |
5.6 |
5.2 |
1.04 |
0.88-1.2 |
<0.001 |
| 500-999 |
2363 |
4.6 |
3.8 |
4.0 |
5.6 |
5.6 |
1.49 |
1.27-1.75 |
<0.001 |
| 1000-1499 |
3369 |
4.2 |
5.6 |
4.4 |
5.3 |
4.0 |
0.71 |
0.61-0.84 |
0.88 |
| 1500-2499 |
3851 |
6.3 |
1.5 |
4.9 |
8.4 |
8.2 |
5.45 |
4.30-6.92 |
<0.001 |
| ≥2500 | 9980 | 6.1 | 5.6 | 5.5 | 6.8 | 6.5 | 1.15 | 1.05-1.25 | <0.001 |
1n refers to number of cases of atonic postpartum hemorrhage.
2P value based on data for all years between 2000 and 2009.
RR denotes rate ratio and 95% CI denotes 95% confidence intervals.