Table 1. Demographic Data of Patients Who Underwent Percutaneous Epidural Neuroplasty According to Their Dural Sac Cross-Sectional Areas.
| Group | G1-1 | G1-2 | p value | G2-1 | G2-2 | G2-3 | p value |
|---|---|---|---|---|---|---|---|
| <50% | ≥50% | G1-1 vs. G1-2 | <33.3% | 33.3-66.7% | >66.7% | G2-1 vs. G2-2, G2-1 vs. G2-3, G2-2 vs. G2-3 | |
| Age (yrs) | 42.8±13.3 | 48.3±13.3 | <0.001 | 43.5±13.0 | 44.0±13.7 | 49.5±13.0 | 0.795, 0.002, 0.001 |
| Sex (percentage male) | 48 | 49 | 0.907 | 43 | 52 | 49 | 0.189, 0.419, 0.562 |
| Back pain | 99 | 99 | 0.729 | 99 | 100 | 99 | 0.152, 0.926, 0.129 |
| Leg pain | 68 | 68 | 0.969 | 72 | 66 | 69 | 0.332, 0.615, 0.582 |
| Numbness | 51 | 56 | 0.441 | 52 | 50 | 61 | 0.778, 0.198, 0.057 |
| Weakness | 1 | 1 | 0.729 | 1 | 1 | 1 | 0.604, 0.678, 0.922 |
| Symptom duration (months) | 25.4±34.8 | 22.8±35.7 | 0.486 | 27.6±37.6 | 22.8±35.4 | 23.2±34.0 | 0.356, 0.390, 0.937 |
| PreVAS (back) | 6.9±1.1 | 6.8±1.3 | 0.619 | 6.8±1.0 | 6.9±1.1 | 6.8±1.4 | 0.523, 0.873, 0.395 |
| PreVAS (leg) | 6.9±1.1 | 4.2±2.1 | 0.493 | 3.9±2.3 | 4.0±2.2 | 4.3±1.9 | 0.654, 0.099, 0.153 |
| No. cases | 157 | 206 | - | 75 | 154 | 134 | - |
VAS, Visual Analog Scale.
Category 1-1, with less than 50%; Category 1-2, with more than 50%; Category 2-1, with less than 33.3%; Category 2-2, between 33.3% and 66.7%; and Category 2-3, with more than 66.7%.