Table 1.
Baseline demographic, surgical and functional outcome data
| Total | PCSI | Reoperation | |||
|---|---|---|---|---|---|
| Yes | No | Yes | No | ||
| Number (%) | 148 | 47 (31.8) | 101 (68.2) | 21 (14.2) | 127 (85.8) |
| Mean age (SD) | 55.2 (16.0) | 52.5 (15.8) | 56.4 (16.0) | 52.4 (16.1) | 55.6 (16.0) |
| Female (%) | 79 (53.4) | 28 (18.9) | 51 (75.0) | 12 (8.1) | 67 (45.3) |
| WCB (%) | 9 (6.1) | 2 (1.4) | 7 (4.7) | 3 (2.0) | 6 (4.1) |
| Smoking (%) | 10 (6.8) | 4 (2.7) | 6 (4.1) | 1 (0.7) | 9 (6.1) |
| Primary diagnosis (%) | |||||
| Disc herniation | 57 (38.5) | 21 (44.7) | 36 (35.6) | 9 (42.9) | 48 (37.8) |
| Spinal stenosis | 46 (31.1) | 14 (29.8) | 32 (31.7) | 5 (23.8) | 41 (32.3) |
| Degenerative spondylolisthesis | 35 (23.6) | 11 (23.4) | 24 (23.8) | 5 (23.8) | 30 (23.6) |
| Isthmic spondylolisthesis | 10 (6.8) | 1 (2.1) | 9 (8.9) | 2 (9.5) | 8 (6.3) |
| Multilevel surgery (%) | 59 (39.9) | 18 (12.2) | 41 (27.7) | 11 (7.4) | 48 (32.4) |
| Procedure (%) | |||||
| Discectomy | 45 (30.4) | 17 (36.2) | 28 (27.7) | 8 (38.1) | 37 (29.1) |
| Decompression | 51 (34.5) | 17 (36.2) | 34 (33.7) | 7 (33.3) | 44 (34.7) |
| Fusion | 52 (35.1) | 13 (27.7) | 39 (38.6) | 6 (28.6) | 46 (36.2) |
| Baseline functional outcome (SD) | |||||
| BP | 21.9 (16.0) | 19.8 (15.1) | 23.0 (16.3) | 21.0 (17.9) | 22.1 (15.7) |
| PF | 28.8 (22.9) | 27.2 (22.0) | 28.7 (22.5) | 25.0 (19.9) | 28.8 (22.7) |
| PCS | 25.4 (10.3) | 24.2 (9.6) | 26.2 (10.7) | 24.1 (8.5) | 25.8 (10.7) |
| ODI | 21.2 (27.6) | 41.8 (27.6)* | 27.5 (27.1)* | 38.3 (24.3) | 30.9 (28.5) |
Null hypothesis: no difference between groups (PCSI-Yes vs. PCSI-No and Reoperation-Yes vs. Reoperation-No) for baseline data
PCSI Postoperative cross-sectional imaging, SD standard deviation, WCB worker’s compensation board claim, BP mean change in the bodily pain index (SF-36), PF mean change in the physical function index (SF-36), PCS mean change in physical component summary score (SF-36), ODI mean change in Oswestry disability index
* Significant at the P < 0.005 level