Table 1 Results of univariate analyses to determine patient and tumour dependent factors predictive of recurrence-free survival
N | Estimated 1-year RFS (95% CI) | Estimated 2-year RFS (95% CI) | Estimated 5-year RFS (95% CI) | P (log-rank)* | |
|---|---|---|---|---|---|
Age (years) | |||||
<60 | 55 | 96.2 (85.6–99.0) | 91.5 (78.7–96.7) | 86.5 (72.3–93.8) | 0.075 |
≥60 | 13 | 69.2 (37.3–87.2) | 69.2 (37.3–87.2) | 69.2 (37.3–87.2) | |
Sex | |||||
Female | 35 | 81.8 (63.9–91.4) | 78.4 (59.9–89.1) | 78.4 (59.9–89.1) | 0.237 |
Male | 33 | 100 (−) | 96.2 (75.7–99.4) | 87.2 (65.2–95.7) | |
Site | |||||
Upper extremity | 20 | 77.1 (49.5–90.9) | 70.7 (42.8–86.8) | 63.6 (35.7–82.0) | 0.013 |
Lower extremity | 17 | 93.8 (63.2–99.1) | 93.8 (63.2–99.1) | 93.8 (63.2–99.1) | 0.237 |
Head/neck | 8 | 85.7 (33.4–97.9) | 85.7 (33.4–97.9) | 71.4 (25.8–92.0) | – |
Trunk | 23 | 100 (−) | 94.1 (65.0–99.1) | 94.1 (65.0–99.1) | 0.086 |
Tumour size | |||||
<2 cm | 36 | 94.3 (79.0–98.5) | 90.8 (73.9–97.0) | 90.8 (73.9–97.0) | 0.123 |
≥2 cm | 32 | 86.1 (67.1–94.6) | 82.4 (62.7–92.3) | 73.5 (51.8–86.5) | |
Histologic grade | |||||
G1 (low-grade DFSP) | 54 | 95.9 (84.7–99.0) | 93.5 (81.2–97.9) | 93.5 (81.2–97.9) | |
G2 (FS-DFSP) | 14 | 68.1 (35.4–86.8) | 59.6 (28.2–80.9) | 39.7 (13.0–65.8) | <0.0001 |