Table 5.
Statistical comparison between asymptomatic group and revision group (only the levels with hematoma in both groups)
| Groups | Q1 area (mm2) | Median (mean) area (mm2) | Q3 area (mm2) | p value | |
|---|---|---|---|---|---|
| Preop stenosis hard area (mm2) | Asymptomatic | 75.00 | 92.00 (96.50) | 131.00 | 0.2858 |
| Revision | 61.75 | 80.00 (85.80) | 92.75 | ||
| Postop stenosis hard area (mm2) | Asymptomatic | 247.00 | 326.50 (345.30) | 412.75 | 0.0546 |
| Revision | 301.25 | 448.00 (411.00) | 512.00 | ||
| Quotient hard | Asymptomatic | 2.21 | 3.47 | 4.72 | 0.2032 |
| Revision | 3.06 | 4.35 | 6.38 | ||
| Preop dural sac area (mm2) | Asymptomatic | 50.00 | 69.00 (68.70) | 84.00 | 0.2096 |
| Revision | 60.00 | 78.00 (84.00) | 92.75 | ||
| Postop dural sac area (mm2) | Asymptomatic | 75.00 | 88.00 (84.1) | 115. 00 | 0.0000 |
| Revision | 0.00 | 0.00 (17.50) | 26.25 | ||
| Quotient dural sac | Asymptomatic | 0.88 | 1.38 | 1.88 | 0.0000 |
| Revision | 0.00 | 0.00 | 0.38 |