Table 4.
Analysis of risk factors for recurrence of SCTs.
| Recurrence rate | Univariate analysis | ||
|---|---|---|---|
| Odds ratio (95% CI) | P | ||
| Complete resection | |||
| Yes | 9/87 | 1 | |
| No | 6/17 | 4.727 (1.409, 15.862) | 0.007 |
| Altman classification | |||
| I | 4/49 | 1 | |
| II | 4/26 | 2.045 (0.467, 8.956) | 0.335 |
| III | 3/13 | 3.375 (0.651, 17.509) | 0.131 |
| IV | 3/15 | 2.812 (0.553, 14.308) | 0.199 |
| Histology | |||
| Mature | 7/65 | 1 | |
| Immature | 1/11 | 0.829 (0.092, 7.479) | 0.867 |
| Malignant | 8/28 | 3.314 (1.066, 10.307) | 0.032 |
| Tumor volume (cm3) | |||
| ≤150 | 8/68 | 1 | |
| 151 to 500 | 4/23 | 1.579 (0.428, 5.831) | 0.491 |
| >500 | 3/13 | 2.250 (0.509, 9.946) | 0.275 |
| Age at surgery | |||
| ≤1 month | 5/28 | 1 | |
| 1 month to 1 year | 4/35 | 0.594 (0.143, 2.458) | 0.469 |
| ≥1 year | 6/41 | 0.789 (0.215, 2.888) | 0.72 |
| Coccyx completely removed | |||
| Yes | 15/97 | 1 | |
| No | 0/4 | 0 | 0.999 |
CI – confidence interval.