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Table 2 Atonic postpartum hemorrhage by region and hospital volume, British Columbia, 2000-2009

From: Trends in postpartum hemorrhage from 2000 to 2009: a population-based study

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
  1. 1n refers to number of cases of atonic postpartum hemorrhage.
  2. 2P value based on data for all years between 2000 and 2009.
  3. RR denotes rate ratio and 95% CI denotes 95% confidence intervals.