Odds of admission by year
| Unadjusted | Adjusted | ||||
| Model | Year | OR | (95% CI) | OR | (95% CI) |
| Child ambulance | April 2010–March 2011 (ref) | 1.000 | – | 1.000 | – |
| April 2011–March 2012 | 1.054 | (1.037 to 1.072) | 0.937 | (0.919 to 0.955) | |
| April 2012–March 2013 | 1.129 | (1.111 to 1.148) | 0.919 | (0.901 to 0.938) | |
| April 2013–March 2014 | 1.085 | (1.068 to 1.104) | 0.868 | (0.850 to 0.886) | |
| April 2014–March 2015 | 1.097 | (1.079 to 1.116) | 0.848 | (0.830 to 0.866) | |
| Child walk-in | April 2010–March 2011 (ref) | 1.000 | – | 1.000 | – |
| April 2011–March 2012 | 0.890 | (0.882 to 0.899) | 0.862 | (0.853 to 0.871) | |
| April 2012–March 2013 | 0.976 | (0.967 to 0.985) | 0.849 | (0.839 to 0.858) | |
| April 2013–March 2014 | 0.932 | (0.923 to 0.940) | 0.821 | (0.812 to 0.831) | |
| April 2014–March 2015 | 0.918 | (0.909 to 0.926) | 0.774 | (0.765 to 0.783) | |
| Adult ambulance | April 2010–March 2011 (ref) | 1.000 | – | 1.000 | – |
| April 2011–March 2012 | 1.008 | (1.002 to 1.013) | 0.919 | (0.913 to 0.925) | |
| April 2012–March 2013 | 1.007 | (1.002 to 1.013) | 0.838 | (0.832 to 0.844) | |
| April 2013–March 2014 | 0.968 | (0.963 to 0.974) | 0.806 | (0.800 to 0.811) | |
| April 2014–March 2015 | 1.008 | (1.002 to 1.013) | 0.791 | (0.785 to 0.796) | |
| Adult walk-in | April 2010–March 2011 (ref) | 1.000 | – | 1.000 | – |
| April 2011–March 2012 | 0.993 | (0.988 to 0.999) | 0.918 | (0.912 to 0.923) | |
| April 2012–March 2013 | 1.024 | (1.019 to 1.030) | 0.837 | (0.832 to 0.843) | |
| April 2013–March 2014 | 0.989 | (0.984 to 0.995) | 0.791 | (0.786 to 0.797) | |
| April 2014–March 2015 | 1.012 | (1.007 to 1.018) | 0.771 | (0.765 to 0.776) | |