Table 1.
The clinical characteristic of patient with good outcome versus with poor outcome.
| Variable | Total (n = 204) |
Good outcome (n = 139) |
Poor outcome (n = 65) |
P |
|---|---|---|---|---|
| Male sex | 81 (39.7) | 53 (38.1) | 28 (43.1) | 0.541 |
| Age, year | 49.6 ± 13.3 | 48.5 ± 13.4 | 52.0 ± 13.0 | 0.080 |
| Cervical lordosis1 | 7.9 ± 11.1 | 10.4 ± 10.0 | 2.5 ± 11.3 | < 0.001 |
| Cervical lordosis2 | 8.3 ± 11.8 | 11.8 ± 9.8 | 0.9 ± 12.5 | < 0.001 |
| C2 slope | 10.5 ± 7.8 | 10.2 ± 7.4 | 11.1 ± 8.7 | 0.486 |
| C7 slope | 17.1 ± 8.5 | 17.5 ± 8.9 | 16.3 ± 7.4 | 0.345 |
| C2 slope –Cervical lordosis1 | 2.6 ± 14.9 | -0.2 ± 13.1 | 8.5 ± 16.8 | < 0.001 |
| C2 slope –Cervical lordosis2 | 2.2 ± 15.8 | -1.5 ± 13.3 | 10.1 ± 17.8 | < 0.001 |
| C2 slope / Cervical lordosis1 | 0.3 ± 1.9 | 0.4 ± 1.7 | -0.1 ± 2.4 | 0.055 |
| C2 slope / Cervical lordosis2 | 0.1 ± 2.0 | 0.6 ± 1.9 | -0.9 ± 1.9 | < 0.001 |
| C7 slope –Cervical lordosis1 | 9.2 ± 10.1 | 7.1 ± 9.3 | 13.8 ± 10.3 | < 0.001 |
| C7 slope –Cervical lordosis2 | 8.8 ± 11.1 | 5.7 ± 9.6 | 15.4 ± 11.2 | < 0.001 |
| C7 slope / Cervical lordosis1 | 0.8 ± 2.1 | 1.1 ± 1.7 | 0.3 ± 2.8 | 0.012 |
| C7 slope / Cervical lordosis2 | 0.5 ± 2.2 | 1.1 ± 1.9 | -0.8 ± 2.4 | < 0.001 |
| C1-C7 SVA | 1.5 ± 0.8 | 1.5 ± 0.8 | 1.6 ± 0.9 | 0.163 |
| C2-C7 SVA | 1.1 ± 0.6 | 1.0 ± 0.6 | 1.1 ± 0.7 | 0.220 |
| C1-C7 SVA - C2-C7 SVA | 0.5 ± 0.4 | 0.4 ± 0.3 | 0.5 ± 0.5 | 0.256 |
| Level | < 0.001 | |||
| 2 | 50 (24.5) | 46 (33.1) | 4 (6.2) | |
| 4 | 137 (67.2) | 83 (59.7) | 54 (83.1) | |
| 6 | 17 (8.3) | 10 (7.2) | 7 (10.8) | |
| ossification of nuchal ligament | 48 (23.5) | 20 (14.4) | 28 (43.1) | < 0.001 |
| Fusion | 44 (21.6) | 17 (12.2) | 27 (41.5) | < 0.001 |
| Adjacent facet joint pain due to fusion | 43 (21.1) | 17 (12.2) | 26 (40.0) | < 0.001 |
| Group | 0.078 | |||
| Block only | 47 (23.0) | 27 (19.4) | 20 (30.8) | |
| Block and PRF | 157 (77.0) | 112 (80.6) | 45 (69.2) |
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 ).