Procedure numbers and rates among patients in Ontario who underwent surgery for degenerative disease of the lumbar spine between Apr. 1, 1995, and Dec. 31, 2001
| Year | No. (%) of patients | Rate per 100 000 population aged ≥ 50 yr | |||||
|---|---|---|---|---|---|---|---|
| Decompression | Noninstrumented fusion | Instrumented fusion | Total | Decompression | Total fusion | Total procedure | |
| 1995 | 600 (72.0) | 39 (4.7) | 194 (23.3) | 833 | 21.0 | 8.2 | 29.2 |
| 1996 | 706 (78.3) | 39 (4.3) | 157 (17.4) | 902 | 24.2 | 6.7 | 30.9 |
| 1997 | 633 (71.2) | 30 (3.4) | 226 (25.4) | 889 | 21.0 | 8.5 | 29.5 |
| 1998 | 625 (69.6) | 34 (3.8) | 239 (26.6) | 898 | 20.1 | 8.8 | 28.9 |
| 1999 | 594 (66.4) | 41 (4.6) | 259 (29.0) | 894 | 18.6 | 9.4 | 28.0 |
| 2000 | 619 (61.9) | 59 (5.9) | 322 (32.2) | 1000 | 18.9 | 11.6 | 30.5 |
| 2001 | 423 (59.4) | 47 (6.6) | 242 (34.0) | 712 | 16.8 | 11.5 | 28.3 |
| 564* (59.4)* | 63* (6.6)* | 323* (34.0)* | (949)* | ||||
↵* Numbers and rates adjusted by 4/3.