Patient demographic characteristics by year
| Year | No. of patients n = 13 493 | Mean age ± SD, yr | % of patients > 75 yr of age | % of patients > 85 yr of age | % of patients female | Mean CCI score ± SD | % of patients with neurodeficit |
|---|---|---|---|---|---|---|---|
| 2006 | 978 | 48.4 ± 12.4 | 45.3 | 6.5 | 54.1 | 1.7 ± 0.9 | 16.4 |
| 2007 | 875 | 49.8 ± 14.7 | 46.0 | 6.7 | 53.4 | 1.8 ± 1.1 | 14.2 |
| 2008 | 938 | 51.5 ± 11.3 | 46.8 | 5.9 | 48.8 | 1.7 ± 0.8 | 16.9 |
| 2009 | 984 | 50.6 ± 13.2 | 45,3 | 6.3 | 55.3 | 1.9 ± 0.8 | 13.3 |
| 2010 | 895 | 52.8 ± 14.9 | 44.9 | 6.4 | 52.6 | 1.8 ± 1.0 | 14.0 |
| 2011 | 925 | 53.5 ± 13.4 | 47,4 | 6.9 | 51.9 | 1.9 ± 1.1 | 12.5 |
| 2012 | 903 | 53.7 ± 12.8 | 48.1 | 7.2 | 51.2 | 2.0 ± 0.9 | 10.7 |
| 2013 | 921 | 53.4 ± 13.4 | 47.7 | 8.1 | 54.5 | 2.2 ± 1.1 | 14.9 |
| 2014 | 992 | 54.1 ± 12.1 | 48.8 | 7.8 | 48.9 | 2.3 ± 1.0 | 15.7 |
| 2015 | 965 | 55.8 ± 12.7 | 49.2 | 8.6 | 52.7 | 2.3 ± 0.8 | 15.3 |
| 2016 | 916 | 55.5 ± 14.2 | 50.4 | 9.5 | 52.1 | 2.5 ± 1.2 | 13.0 |
| 2017 | 978 | 56.4 ± 14.8 | 51.1 | 9.4 | 51.8 | 2.6 ± 1.1 | 15.3 |
| 2018 | 1105 | 57.2 ± 13.6 | 52.6 | 8.9 | 53.5 | 2.5 ± 1.2 | 15.8 |
| 2019 | 1118 | 58.1 ± 13.7 | 51.2 | 9.8 | 54.2 | 2.6 ± 0.9 | 16.1 |
CCI = Charlson Comorbidity Index; SD = standard deviation.