Table 4.
The clinical characteristic of patient with good outcome versus with poor outcome stratified by receiving block only or both block and RF surgery.
| Variable | Block only | Block and RF | ||||
|---|---|---|---|---|---|---|
| Good outcome (n = 27) |
Poor outcome (n = 20) |
P | Good outcome (n = 112) |
Poor outcome (n = 45) |
P | |
| Male sex | 8 (29.6) | 6 (30.0) | 1.000 | 45 (40.2) | 22 (48.9) | 0.373 |
| Age, year | 47.8 ± 10.8 | 53.3 ± 13.0 | 0.121 | 48.6 ± 14.0 | 51.4 ± 13.1 | 0.255 |
| Cervical lordosis1 | 9.5 ± 11.2 | 4.4 ± 9.9 | 0.115 | 10.7 ± 9.8 | 1.7 ± 11.9 | < 0.001 |
| Cervical lordosis2 | 10.4 ± 9.5 | 1.4 ± 10.9 | 0.004 | 12.1 ± 9.9 | 0.8 ± 13.3 | < 0.001 |
| C2 slope | 10.9 ± 6.4 | 9.1 ± 5.3 | 0.306 | 10.1 ± 7.6 | 11.9 ± 9.7 | 0.205 |
| C7 slope | 17.1 ± 9.8 | 16.5 ± 6.4 | 0.798 | 17.6 ± 8.7 | 16.2 ± 7.9 | 0.360 |
| C2 slope – Cervical lordosis1 | 1.4 ± 14.5 | 4.7 ± 12.2 | 0.421 | -0.6 ± 12.8 | 10.2 ± 18.3 | < 0.001 |
| C2 slope – Cervical lordosis2 | 0.5 ± 13.3 | 7.8 ± 13.6 | 0.073 | -2.0 ± 13.4 | 11.2 ± 19.4 | < 0.001 |
| C2 slope / Cervical lordosis1 | 0.1 ± 2.1 | 0.1 ± 2.7 | 0.965 | 0.5 ± 1.6 | -0.3 ± 2.2 | 0.020 |
| C2 slope / Cervical lordosis2 | 0.8 ± 2.1 | -0.4 ± 1.5 | 0.042 | 0.6 ± 1.9 | -1.1 ± 2.0 | < 0.001 |
| C7 slope – Cervical lordosis1 | 7.7 ± 9.7 | 12.1 ± 7.4 | 0.094 | 6.9 ± 9.2 | 14.5 ± 11.3 | < 0.001 |
| C7 slope – Cervical lordosis2 | 6.7 ± 9.5 | 15.2 ± 8.2 | 0.003 | 5.5 ± 9.6 | 15.5 ± 12.4 | < 0.001 |
| C7 slope / Cervical lordosis1 | 0.9 ± 1.4 | 0.5 ± 3.1 | 0.577 | 1.2 ± 1.7 | 0.2 ± 2.7 | 0.009 |
| C7 slope / Cervical lordosis2 | 1.1 ± 1.3 | -0.1 ± 2.6 | 0.045 | 1.1 ± 2.0 | -1.1 ± 2.3 | < 0.001 |
| C1-C7 SVA | 1.4 ± 0.5 | 1.5 ± 0.6 | 0.375 | 1.5 ± 0.8 | 1.7 ± 1..0 | 0.193 |
| C2-C7 SVA | 1.0 ± 0.3 | 1.1 ± 0.5 | 0.229 | 1.0 ± 0.6 | 1.1 ± 0.7 | 0.355 |
| C1-C7 SVA - C2-C7 SVA | 0.4 ± 0.3 | 0.4 ± 0.4 | 0.961 | 0.5 ± 0.3 | 0.6 ± 0.5 | 0.130 |
| Level | 0.018 | < 0.001 | ||||
| 2 | 11 (40.7) | 2 (10.0) | 35 (31.3) | 2 (4.4) | ||
| 4 | 16 (59.3) | 16 (80.0) | 67 (59.8) | 38 (84.4) | ||
| 6 | 0 (0.0) | 2 (10.0) | 10 (8.9) | 5 (11.1) | ||
| Ossification of nuchal ligament | 5 (18.5) | 13 (65.0) | 0.002 | 15 (13.4) | 15 (33.3) | 0.007 |
| Fusion | 6 (22.2) | 9 (45.0) | 0.122 | 11 (9.8) | 18 (40.0) | < 0.001 |
| Adjacent facet joint pain due to fusion | 6 (22.2) | 9 (45.0) | 0.122 | 11 (9.8) | 17 (37.8) | < 0.001 |
Abbreviation: PRF, pulse radiofrequency. Cervical lordosis1: C2-C7 cobb angle; Cervical lordosis2: the angle measured by the Jackson physiological stress line method, SVA: sagittal vertical axis (cm).