Type of maternity unit | Total number of births at term | Total number of adverse events, n (%) | Adverse events reported, n (%) | Number of adverse events with adequate assessment, n (%) |
---|---|---|---|---|
Six maternity units selected by the supervisory authorities as high-risk | 7720 | 215 (2.78) | 15 (6.97) | 6 (40.00 %) |
Six maternity units allocated randomly as a control group | 9603 | 309 (3.21) | 32 (10.35) | 17 (53.12 %) |
Chi2, df | 2.7324, 1 | 2.5609, 1 | 2.4781, 1 | |
p-value | > 0.10 | > 0.10 | > 0.10 |