Table 3 Univariate analysis (log-rank test) for overall survival (n = 24)
Variables | n | 3-year OS | 95% CI | P value |
|---|---|---|---|---|
Age (years) | < 0.001 | |||
< 56 | 11 | 90.9% | 50.8–98.7 | |
≥ 56 | 13 | 38.5% | 14.1–62.8 | |
Sex | 0.28 | |||
Male | 4 | 50.0% | 5.8–84.5 | |
Female | 20 | 65.0% | 40.3–81.5 | |
Histological subtypes | 0.01 | |||
Leiomyosarcoma | 19 | 73.7% | 47.9–88.1 | |
Dedifferentiated liposarcoma | 3 | NA | NA | |
Others | 2 | NA | NA | |
Disease-free interval (months) | 0.04 | |||
< 15 months | 9 | 44.4% | 13.6–71.9 | |
≥ 15 months | 15 | 73.3% | 43.6–89.1 | |
Extent of lung metastases | 0.2 | |||
Unilateral | 8 | 62.5% | 22.9–86.1 | |
Bilateral | 16 | 62.5% | 34.9–81.1 | |
Preoperative chemotherapy for lung metastases | 0.84 | |||
Yes | 9 | 55.6% | 20.4–80.5 | |
No | 15 | 66.7% | 37.5–84.6 | |
NLR before the first PM | 0.8 | |||
< 1.92 | 6 | 83.3% | 27.3–97.5 | |
≥ 1.92 | 18 | 55.6% | 30.5–74.8 | |
NLR before the most recent PM | 0.41 | |||
< 2.48 | 15 | 60.0% | 31.8–79.7 | |
≥ 2.48 | 9 | 66.7% | 28.2–87.8 | |
Surgical approach | 0.16 | |||
Open | 7 | 42.9% | 9.8–73.4 | |
Mini-thoracotomy | 13 | 69.2% | 37.3–87.2 | |
VATS | 4 | 75.0% | 12.8–96.1 | |
Type of resection | 0.31 | |||
Lobectomy | 1 | 100.0% | NA | |
Segmentectomy | 6 | 50.0% | 11.1–80.4 | |
Wedge resection | 17 | 64.7% | 37.7–82.3 | |
Size of the largest resected tumor | 0.04 | |||
< 27mm | 17 | 76.5% | 48.8–90.4 | |
≥ 27mm | 7 | 28.6% | 4.1–61.2 | |
Total number of resected tumors | 0.6 | |||
< 7 | 13 | 61.5% | 30.8–81.8 | |
≥ 7 | 11 | 63.6% | 29.7–84.5 | |
Complete resection | 0.17 | |||
Yes | 20 | 70.0% | 45.1–85.3 | |
No | 4 | 25.0% | 0.9–66.5 | |
Repeated resection | 0.41 | |||
Yes | 15 | 66.7% | 37.5–84.6 | |
No | 9 | 55.6% | 20.4–80.5 |