TABLE 3.
Study characteristics according to Enneking appropriateness
| Variable | Value* | p Value | |
|---|---|---|---|
| EA | EI | ||
| Age at surgery (yrs) (n = 142) | 57.1 ± 13.8 | 61.5 ± 13.7 | 0.063§ |
| Sex (n = 142) | |||
| Female | 19 (33) | 30 (36) | 0.716‡ |
| Male | 39 (67) | 54 (64) | |
| Diagnostic method (n = 110) | |||
| Open biopsy | 5 (10) | 23 (37) | <0.001† |
| CT-trocar biopsy | 39 (81) | 23 (37) | |
| Intraoperative biopsy | 4 (8) | 16 (26) | |
| Spinal location (n = 133) | |||
| Cervical | 11 (20) | 30 (38) | 0.018‡ |
| Thoracic | 7 (13) | 16 (20) | |
| Lumbar | 36 (67) | 33 (42) | |
| No. of vertebral levels spanned by tumor (n = 142) | |||
| 1 | 39 (67) | 43 (51) | 0.057‡ |
| ≥2 | 19 (33) | 41 (49) | |
| Tumor grade (n = 141) | |||
| Low (Grade I) | 34 (60) | 55 (65) | 0.482‡ |
| High (Grade II) | 23 (40) | 29 (35) | |
| Tumor vol ellipsoid body (cm3) (n = 113)¶ | |||
| <20 | 14 (27) | 24 (39) | 0.169‡ |
| 20–59 | 22 (42) | 16 (26) | |
| ≥60 | 16 (31) | 21 (34) | |
| Adjuvant therapy (n = 138) | |||
| No | 44 (79) | 33 (40) | <0.001‡ |
| Yes | 12 (21) | 49 (60) | |
| Local recurrence (n = 142) | |||
| No | 49 (84) | 45 (54) | <0.001‡ |
| Yes | 9 (16) | 39 (46) | |
| Survival (n = 142) | |||
| Alive | 45 (78) | 52 (62) | 0.048‡ |
| Dead | 13 (22) | 32 (38) | |
*
Data are presented as number of patients (%) unless noted otherwise. Mean values are presented as the ± SD.
†
Fisher exact test.
‡
Chi-square test.
§
Student t-test.
¶
Tumor volume ellipsoid body = π/6 × height × width × depth.