Surgical demographic characteristics by year
| Year | Diagnostic category; no. (%*) of patients 13493 | Mean SSII score ± SD | % of patients with SSII score < 10 | % of patients with SSII score > 21 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Total n = 13 493 | Trauma n = 3300 | Oncology n = 1395 | Deformity n = 1997 | Degenerative n = 4435 | Other n = 2366 | ||||
| 2006 | 978 | 225 (23.0) | 78 (8.0) | 156 (16.0) | 342 (35.0) | 177 (18.1) | 15.4 ± 5.6 | 13.9 | 52.5 |
| 2007 | 875 | 245 (28.0) | 66 (7.5) | 123 (14.1) | 297 (33.9) | 144 (16.5) | 17.6 ± 6.3 | 13.3 | 52.0 |
| 2008 | 938 | 253 (27.0) | 80 (8.5) | 169 (18.0) | 281 (30.0) | 155 (16.5) | 18.0 ± 5.7 | 13.4 | 51.9 |
| 2009 | 984 | 236 (24.0) | 103 (10.5) | 157 (16.0) | 339 (34.4) | 149 (15.1) | 18.7 ± 6.1 | 12.5 | 56.5 |
| 2010 | 895 | 219 (24.5) | 98 (10.9) | 134 (15.0) | 300 (33.5) | 144 (16.1) | 18.8 ± 6.8 | 11.4 | 61.3 |
| 2011 | 925 | 245 (26.5) | 97 (10.5) | 134 (14.5) | 315 (34.0) | 134 (14.5) | 19.1 ± 6.8 | 12.3 | 60.0 |
| 2012 | 903 | 235 (26.0) | 113 (12.5) | 131 (14.5) | 316 (35.0) | 108 (12.0) | 18.9 ± 7.1 | 8.9 | 57.8 |
| 2013 | 921 | 244 (26.5) | 88 (9.6) | 147 (16.0) | 299 (32.5) | 143 (15.5) | 18.4 ± 8.8 | 10.5 | 60.7 |
| 2014 | 992 | 253 (25.5) | 104 (10.5) | 159 (16.0) | 298 (30.0) | 178 (17.9) | 19.1 ± 8.3 | 8.4 | 59.2 |
| 2015 | 965 | 241 (25.0) | 111 (11.5) | 140 (14.5) | 318 (33.0) | 155 (16.1) | 20.6 ± 9.2 | 8.5 | 58.5 |
| 2016 | 916 | 229 (25.0) | 110 (12.0) | 120 (13.1) | 289 (31.6) | 168 (18.3) | 20.3 ± 9.7 | 9.3 | 61.4 |
| 2017 | 978 | 220 (22.5) | 108 (11.0) | 127 (13.0) | 318 (32.5) | 205 (21.0) | 19.9 ± 9.4 | 9.9 | 60.5 |
| 2018 | 1105 | 243 (22.0) | 116 (10.5) | 149 (13.5) | 343 (31.0) | 254 (23.0) | 20.5 ± 9.9 | 7.3 | 61.8 |
| 2019 | 1118 | 212 (19.0) | 123 (11.0) | 151 (13.5) | 380 (34.0) | 252 (22.5) | 20.5 ± 9.1 | 8.4 | 61.3 |
SD = standard deviation; SSII = Spine Surgery Invasiveness Index.
↵* By year total.