07 April 2022: Clinical Research
Risk Factors for Poor Outcomes of Thoracic Ossification of Ligamentum Flavum After Laminectomy
Jiayuan Sun ABCE* , Peiyu Du ABCDE* , Yong Shen ABF*DOI: 10.12659/MSM.935711
Med Sci Monit 2022; 28:e935711
Table 2 Comparison of clinical data between Group GP and Group PP.
| Group GP (33 cases) | Group PP (31 cases) | t/z | P value | |
|---|---|---|---|---|
| Age | 58.42±5.87 | 60.26±7.63 | 0.815 | 0.415 |
| Sex (Male/Female) | 21/12 | 18/13 | 0.208 | 0.648 |
| Duration of symptoms before surgery (months) | 18.12±10.05 | 26.42±12.67 | 2.787 | 0.005 |
| Follow-up duration (months) | 32.07±7.85 | 30.83±7.22 | 1.249 | 0.212 |
| Ossification of segments | 4.002 | 0.135 | ||
| T1–4 | 3 | 7 | ||
| T5–86 | 11 | 19 | ||
| T9–12 | 32 | 26 | ||
| Number of ossified segments | 1.753 | 0.416 | ||
| 1 | 22 | 16 | ||
| 2 | 9 | 11 | ||
| >2 | 2 | 4 | ||
| Accompanied by hypersignal of thoracal cord | 19 | 29 | 11.032 | 0.001 |
| Configurations of OLF in sagittal plane | 6.286 | 0.012 | ||
| Beak-type | 8 | 17 | ||
| Round-type | 25 | 14 | ||
| Accompanied by epidural ossification | 2 | 12 | 9.970 | 0.002 |
| Past history | ||||
| Diabetes | 8 | 11 | 0.968 | 0.325 |
| Hypertension | 12 | 14 | 0.531 | 0.747 |
| Coronary heart disease | 5 | 5 | 0.638 | 0.425 |
| Cerebrovascular disease | 4 | 7 | 1.229 | 0.268 |
| Operation method | 0.207 | 0.249 | ||
| Open laminectomy | 21 | 22 | ||
| Open laminectomy and internal fixation | 11 | 9 | ||
| JOA score | ||||
| Preoperative | 5.33±1.53 | 4.71±1.40 | 1.650 | 0.099 |
| Follow-up | 9.30±0.81 | 6.84±1.37 | 6.427 | |
| t/z | 5.078 | 4.645 | ||
| P value | ||||
| JOA improvement rate (%) | 33.60±18.67 | 71.31±11.16 | 6.902 |