Table 3.
Descriptive characteristics and analysis for determining responsible nerve roots of LDD patients with diagnostic doubt in both construction and validation samples
| Variable | Construction sample | Validation sample | P-value | Adj. OR (95 % CI) | P-value |
|---|---|---|---|---|---|
| (n = 106) | (n = 57) | ||||
| n (%)/x ± s | n (%)/x ± s | ||||
| ECO | 81 | 43 | 0.889 | N/M | N/M |
| VAS score before operation▲ | 0.210 | 1.56 (1.08–2.65) | 0.001 | ||
| ≤2 | 21 | 9 | |||
| 3 ~ 5 | 31 | 12 | |||
| 5 ~ 7 | 41 | 15 | |||
| ≥8 | 23 | 21 | |||
| Stenosis level | 1.44 (1.10–1.89) | 0.04 | |||
| L1-L2▲ | 14 | 5 | 0.400 | ||
| L2-L3▲ | 21 | 6 | 0.128 | ||
| L3-L4▲ | 64 | 27 | 0.111 | ||
| L4-L5▲ | 92 | 44 | 0.116 | ||
| L5-S1▲ | 36 | 12 | 0.085 | ||
| Stenosis locations | 1.95 (1.32–3.51) | 0.01 | |||
| Central▲ | 73 | 36 | 0.460 | ||
| Lateral recess▲ | 82 | 49 | 0.130 | ||
| Neuroforamen▲ | 29 | 14 | 0.250 | ||
| Neurological deficit | 1.62 (1.02–2.79) | 0.01 | |||
| Reflexes: asymmetric depressed▲ | 36 | 16 | 0.442 | ||
| Sensory: asymmetric decrease▲ | 48 | 19 | 0.139 | ||
| Motor: asymmetric weakness▲ | 38 | 23 | 0.571 | ||
| VAS score improvement after SNRB▲ | 0.762 | 3.42 (1.27–7.64) | 0.02 | ||
| ≤24 % | 15 | 9 | |||
| 25 ~ 49 % | 46 | 25 | |||
| 50 ~ 74 % | 24 | 13 | |||
| ≥75 % | 11 | 10 |
▲ indicates significant difference, LDD lumbar degenerative disease, SNRB selective nerve root block, N/M not in the model, Adj. OR adjusted odds ratio, CI confidence interval, VAS Visual analog scale