Table 2.
Imaging findings for the overall, surgery, and non-operative groups.
| Overall | Surgery | Non-operative | |||||||
|---|---|---|---|---|---|---|---|---|---|
| SPS (n=634) |
DS (n=601) |
p-value | SPS (n=394) |
DS (n=369) |
p-value | SPS (n=240) |
DS (n=232) |
p-value | |
| Stenosis Levels | |||||||||
| L2-L3 | 179 (28%) | 53 (9%) | <0.001 | 121 (31%) | 33 (9%) | <0.001 | 58 (24%) | 20 (9%) | <0.001 |
| L3-L4 | 420 (66%) | 236 (39%) | <0.001 | 266 (68%) | 145 (39%) | <0.001 | 154 (64%) | 91 (39%) | <0.001 |
| L4-L5 | 579 (91%) | 580 (97%) | <0.001 | 362 (92%) | 358 (97%) | 0.003 | 217 (90%) | 222 (96%) | 0.039 |
| L5-S1 | 173 (27%) | 57 (9%) | <0.001 | 100 (25%) | 29 (8%) | <0.001 | 73 (30%) | 28 (12%) | <0.001 |
| Stenotic Levels (Mod/Severe) | <0.001 | <0.001 | <0.001 | ||||||
| None | 15 (2%) | 23 (4%) | 6 (2%) | 9 (2%) | 9 (4%) | 14 (6%) | |||
| One | 234 (37%) | 370 (62%) | 140 (36%) | 232 (63%) | 94 (39%) | 138 (59%) | |||
| Two | 241 (38%) | 172 (29%) | 153 (39%) | 104 (28%) | 88 (37%) | 68 (29%) | |||
| Three+ | 144 (23%) | 36 (6%) | 95 (24%) | 24 (7%) | 49 (20%) | 12 (5%) | |||
| Stenosis Severity (of most severe level) | 0.004 | 0.24 | 0.007 | ||||||
| Mild | 15 (2%) | 23 (4%) | 6 (2%) | 9 (2%) | 9 (4%) | 14 (6%) | |||
| Moderate | 282 (44%) | 215 (36%) | 161 (41%) | 131 (36%) | 121 (50%) | 84 (36%) | |||
| Severe | 337 (53%) | 363 (60%) | 227 (58%) | 229 (62%) | 110 (46%) | 134 (58%) | |||