| Full cohort | Cohort excluding respiratory admissions | Cohort of respiratory admissions | Cohort excluding trauma admissions | Cohort of trauma admissions |
---|---|---|---|---|---|
Secular trend (β1) | 0.010a | 0.001 | 0.025 | 0.011b | 0.009 |
Trend post-intervention (β2) | 0.004 | 0.001 | 0.020 | 0.013a | -0.009 |
Immediate effect (β3) | -0.129b | 0.004 | -0.383a | -0.215b | 0.009 |