Estimated mean difference in adverse event (AE) rates between 2013 and 2011 according to severity (with description of severity categories for the AE)
| Severity category | Mean difference (95% CI) |
|---|---|
| E: AE contributed to temporary harm to the patient which required intervention | −2.6 (−3.4 to −0.4)* |
| F: AE contributed to temporary harm to the patient which required initial or prolonged hospitalisation | −0.9 (−1.7 to 1.0) |
| G: AE contributed to permanent patient harm | −0.2 (−0.6 to 0.2) |
| H: intervention was required to sustain life | −0.2 (−0.3 to −0.04)* |
| I: AE contributed to patient death | 0.03 (−0.1 to 0.2) |
| E-I | −3.4 (−4.0 to −0.5)* |
| F-I | −1.3 (−2.0 to 0.6) |
Mean difference in rates of AEs between 2013 and 2011, computed by the mean of the pairwise differences in each hospital. The lower and upper bounds of the 95% CI for the mean of the hospital pairwise differences are given below the estimate and are computed using 10 000 bootstrap simulations.
*Indicates a significant difference between the national AE rates in 2013 and 2011 at 5% significance level.