Table 4.
Comparison between patients with or without severe complications at the final follow-up period (average 105 months).
| Baseline factors | Without severe complications n = 25 |
With severe complications or dead n = 12 |
p value |
|---|---|---|---|
| Age at surgery | 76.9 ± 2.2 | 78.4 ± 3.6 | 0.20 |
| Sex (male : female) | 18 : 7 | 5 : 7 | 0.15 |
| Diagnosis (CSM : OPLL) | 21 : 4 | 9 : 3 | 0.66 |
| Preop C2–7 Cobb angles∗ | 18 ± 8 | 16 ± 10 | 0.53 |
| Postop C2–7 Cobb angles∗ | 15 ± 12 | 12 ± 9 | 0.39 |
| Preop ROM∗ | 33 ± 11 | 31 ± 11 | 0.69 |
| Postop ROM∗ | 20 ± 10 | 21 ± 16 | 0.59 |
| Pretotal JOA∗∗ | 9.5 ± 2.8 | 8.5 ± 3.3 | 0.39 |
| Posttotal JOA∗∗ | 11.4 ± 2.7 | 9.9 ± 2.7 | 0.14 |
| Premotor JOA (U/E) | 2.1 ± 0.9 | 1.7 ± 0.9 | 0.20 |
| Postmotor JOA (U/E)∗∗ | 2.8 ± 0.8 | 2.2 ± 0.5 | 0.02 |
| Premotor JOA (L/E) | 1.4 ± 0.9 | 0.8 ± 0.7 | 0.03 |
| Postmotor JOA (L/E)∗∗ | 2.1 ± 0.7 | 1.4 ± 0.8 | 0.02 |
CSM: cervical spondylotic myelopathy; OPLL: ossification of the longitudinal ligament; Preop: preoperative; Postop: postoperative; ROM: range of motion; U/E: upper extremities; L/E: lower extremities.
∗Two years after surgery, excluding one patient who died 2 weeks after surgery.
∗∗Six months after surgery, excluding one patient who died 2 weeks after surgery.