Table 2.
Patient Baseline of Clinical Characteristics
| Clinical outcomes after 2 years | |||
|---|---|---|---|
| ECOs (n = 81) | NECOs (n = 25) | P | |
| Pseudoclaudication: anyb | 62 | 15 | 0.13 |
| SLR or femoral tensionb | 20 | 8 | 0.51 |
| Course of disease: yrc | 3.2 ± 2.6 | 3.5 ± 3.1 | 0.64 |
| Pain radiation: anyb | 57 | 18 | 0.88 |
| Any neurological deficit | |||
| Reflexes: asymmetric depresseda | 32 | 4 | 0.03 |
| Sensory: asymmetric decreasea | 43 | 5 | 0.02 |
| Motor: asymmetric weaknessa | 34 | 4 | 0.02 |
| VAS improvement rate after SNRBa | 0.01 | ||
| ≤24 % | 8 | 7 | |
| 25 ~ 49 % | 37 | 9 | |
| 50 ~ 74 % | 21 | 3 | |
| ≥75 % | 5 | 6 | |
| ODI improvement rate after SNRBa | 0.13 | ||
| ≤24 % | 20 | 6 | |
| 25 ~ 49 % | 45 | 9 | |
| 50 ~ 74 % | 12 | 6 | |
| ≥75 % | 4 | 4 | |
| VAS score before operationa | 0.01 | ||
| ≤2 | 12 | 9 | |
| 3 ~ 5 | 23 | 8 | |
| 5 ~ 7 | 27 | 4 | |
| ≥8 | 19 | 4 | |
| ODI before operationa | 0.32 | ||
| ≤24 % | 25 | 6 | |
| 25 ~ 49 % | 33 | 7 | |
| 50 ~ 74 % | 18 | 9 | |
| ≥75 % | 5 | 3 | |
| X-ray of lumbar vertebra | |||
| Degenerative scoliosisbb | 25 | 7 | 0.79 |
| Lumbar lordosis disappearb | 72 | 19 | 0.19 |
| Degenerative lumbar instabilityb | 28 | 6 | 0.32 |
| Stenosis level | |||
| L1-L2a | 10 | 4 | 0.74 |
| L2-L3a | 17 | 4 | 0.78 |
| L3-L4b | 59 | 15 | 0.22 |
| L4-L5a | 78 | 17 | 0.02 |
| L5-S1b | 32 | 4 | 0.03 |
| Total number of stenosisa | 0.72 | ||
| Two | 13 | 5 | |
| Three | 36 | 9 | |
| More than 3 | 32 | 11 | |
| Stenosis locations | |||
| Central or Lateral recessb | 71 | 18 | 0.11 |
| Neuroforamen | 21 | 5 | 0.03 |
| Stenosis severityb | 0.55 | ||
| Mild | 25 | 8 | |
| Moderate | 35 | 13 | |
| Severe | 21 | 4 | |
NECO non-effective clinical outcome, VAS Visual analog scale, ODI Oswestry Disability Index, SLR single leg raise
aFisher exact test; bPearson χ 2 test; cMann Whitney U test; ECO: effective clinical outcome