TABLE 1.
Statistical Analysis of Demographics, Clinical Presentation, and Radiographic Parameters
| Decompressed on IOUS and postoperative MRI/CT myelography | Decompressed on IOUS but not postoperative MRI/CT myelography | Total | P value | |
|---|---|---|---|---|
| Age (mean/SD) | 59.44 (14.26) | 55.86 (21.58) | 58.88 (15.42) | .55 |
| Sex, No. (%) | ||||
| Male | 34 (79.07) | 6 (75.00) | 40 (78.43) | |
| Female | 9 (20.93) | 2 (25.00) | 11 (21.57) | 1.00 |
| Mechanism, No. (%) | ||||
| Fall, ground level | 20 (46.51) | 3 (37.50) | 23 (45.10) | |
| Fall, from height | 12 (27.91) | 2 (25.00) | 14 (27.45) | |
| MVC | 9 (20.93) | 1 (12.50) | 10 (19.61) | |
| Sport | 2 (4.65) | 2 (25.00) | 4 (7.84) | .29 |
| Admission AMS (mean/SD) | 50.47 (35.60) | 17.13 (22.50) | 45.24 (35.85) | .0142 |
| Admission AIS grade, No. (%) | ||||
| A | 7 (16.28) | 5 (62.50) | 12 (23.53) | |
| B | 5 (11.63) | 1 (12.50) | 6 (11.76) | |
| C | 9 (20.93) | 1 (12.50) | 10 (19.61) | |
| D | 22 (51.16) | 1 (12.50) | 23 (45.10) | .027 |
| Admission AIS grade, No. (%) | ||||
| A and B (motor complete) | 12 (27.91) | 6 (75.00) | 18 (35.29) | .017 |
| C and D (motor incomplete) | 31 (72.09) | 2 (25.00) | 33 (64.71) | |
| AO morphology, No. (%) | ||||
| A0 | 25 (58.14) | 3 (37.50) | 28 (54.90) | |
| A4 | 1 (2.33) | 0 (0.00) | 1 (1.96) | |
| B2 | 1 (2.33) | 0 (0.00) | 1 (1.96) | |
| B3 | 13 (30.23) | 2 (25.00) | 15 (29.41) | |
| C | 3 (6.97) | 3 (37.50) | 6 (11.77) | .20 |
| AO Spine injury morphology, No. (%) | ||||
| C | 3 (6.98) | 3 (37.50) | 6 (11.76) | .042 |
| All others (A0, A4, B2, and B3) | 40 (93.02) | 5 (62.50) | 45 (88.24) | |
| AO Spine injury modifier, No. (%) | ||||
| None | 32 (74.41) | 5 (62.50) | 37 (72.55) | |
| M2 | 3 (6.98) | 0 (0.00) | 3 (5.88) | |
| M3 | 5 (11.63) | 1 (12.50) | 6 (11.77) | |
| F4 | 3 (6.98) | 2 (25.00) | 5 (9.80) | .32 |
| IMLL (preoperative) (mean/SD) | 32.01 (19.75) | 56.00 (23.43) | 36.27 (22.19) | .0043 |
| IMLL (postoperative) (mean/SD) | 39.92 (29.65) | 71.93 (28.05) | 45.37 (31.53) | .0074 |
| OPLL, No. (%) | ||||
| Yes | 8 (18.60) | 0 (0.00) | 8 (15.69) | |
| No | 35 (81.40) | 8 (100.00) | 43 (84.31) | .33 |
| DISH, No. (%) | ||||
| Yes | 9 (20.93) | 2 (25.00) | 11 (21.57) | |
| No | 34 (79.07) | 6 (75.00) | 40 (78.43) | 1.00 |
| Remote fracture (from the epicenter), No. (%) | ||||
| Yes | 2 (4.65) | 1 (12.50) | 3 (5.88) | |
| No | 41 (95.35) | 7 (87.50) | 48 (94.12) | .41 |
| Preinjury cervical fusion, No. (%) | ||||
| Yes | 3 (6.98) | 0 (0.00) | 3 (5.88) | |
| No | 40 (93.02) | 8 (100.00) | 48 (94.12) | 1.00 |
AIS, ASIA Impairment Scale; AMS, ASIA motor score; CT, computed tomography; DISH, diffuse idiopathic skeletal hyperostosis; IMLL, intramedullary lesion length; IOUS, intraoperative ultrasound; MVC, motor vehicle collision; OPLL, ossified posterior longitudinal ligament.
Continuous variables were evaluated using the t-test (2-tailed), and categorical variables using Fisher's exact test.
Bold indicates statistical significance.