Table 5.
Factors predictive of survival
| Variables | Number of patients | Univariate p | RR | Multivariate p | RR |
|---|---|---|---|---|---|
| Age at diagnosis | |||||
| < 2 years | 12 | ||||
| ≥ 2 years | 86 | 0.78 | 0.73 | ||
| Tumor size | |||||
| < 5 cm | 63 | ||||
| ≥ 5 cm | 35 | 0.13 | 3.74 | 0.76 | 0.68 |
| Depth | |||||
| Superficial | 25 | ||||
| Deep | 73 | 0.74 | 0.75 | ||
| Primary tumor site | |||||
| Upper extremity | 56 | 0.68 | 0.70 | ||
| Lower extremity | 42 | ||||
| Proximity | |||||
| Proximal | 54 | 0.53 | 0.58 | ||
| Distal | 44 | ||||
| Bone or neurovascular involvement | |||||
| Absent | 62 | ||||
| Present | 36 | 0.36 | 2.10 | ||
| Histology | |||||
| Synovial sarcoma | 28 | ||||
| Rhabdomyosarcoma | 16 | ||||
| Fibrosarcoma | 9 | ||||
| MPNST | 6 | ||||
| Others | 39 | 0.13* | |||
| Unplanned excision | |||||
| Yes | 49 | 0.12 | 0.18 | 0.49 | 0.37 |
| No | 49 | ||||
| Surgical margins | |||||
| Negative | 70 | ||||
| Positive | 24 | 0.30† | |||
| Radiation therapy | |||||
| Yes | 44 | 0.73 | 1.33 | ||
| No | 54 | ||||
| Local recurrence | |||||
| Yes | 7 | 0.73† | |||
| No | 77 | ||||
| Metastasis at diagnosis | |||||
| Yes | 14 | 0.001 | 37.0 | 0.003 | 38.1 |
| No | 84 | ||||
* Log rank tests of no differences among categories versus any differences among categories; †Fisher’s exact test of no differences between two categories versus any differences between two categories; RR = rate ratio; MPNST = malignant peripheral nerve sheath tumor.