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. 2019 Dec 13;2019:9069272. doi: 10.1155/2019/9069272

Table 2.

Prognostic factors for overall survival and progression-free survival in all patients with dedifferentiated chondrosarcoma by univariate analysis.

Variable Overall survival (months) Progression-free survival (months)
Median 95% CI P Median 95% CI P
Overall 13.9 6.4–21.5 6.6 3.7–9.4

Age 0.322 0.424
 ≤60 years 14.2 5.8–22.5 8.4 6.5–10.4
 >60 years 12.3 1.7–22.9 5.4 3.8–7.0

Gender 0.445 0.628
 Female 11.8 7.8–15.9 5.9 3.6–8.2
 Male 19.0 8.1–29.9 8.0 4.9–11.2

Pathological fracture <0.001 <0.001
 No 22.6 0–46.1 9.2 0–21.1
 Yes 7.0 4.6–9.4 4.0 2.3–5.8

Site 0.304 0.920
 Extremity 11.8 7.8–15.9 6.1 4.3–7.9
 Axial 19.0 9.6–28.4 9.0 6.6–11.3

Tumor size 0.168 0.255
 ≤8 cm 21.9 15.4–28.4 8.4 4.5–12.3
 >8 cm 11.3 8.1–14.4 6.4 4.6–8.2
 Discontinuous 8.5 0–41.8 1.4 0–108.6

Lymph node involvement <0.001 0.040
 No 14.2 6.6–21.7 7.2 4.5–9.8
 Yes 4.7 1.8–7.6 4.0 2.1–5.9

Distant metastasis <0.001 <0.001
 No 22.6 2.0–43.1 10.2 0.1–20.2
 Yes 6.6 6.1–7.1 4.0 2.6–5.5

Grade 0.323 0.077
 G2 27.4 0.2–54.6 17.8 0–76.7
 G3 12.3 9.1–15.5 6.4 4.6–8.2

AJCC stage <0.001 <0.001
 II 22.6 2.8–42.4 10.2 0–21.4
 III 8.5 0–41.8 1.4 0–108.6
 IV 6.6 6.1–7.1 4.0 2.6–5.5

Extraosseous extension 0.108 0.073
 No 58.9 56.9
 Yes 12.8 8.9–16.6 6.4 3.9–8.9

Lymphovascular invasion 0.128 0.220
 No 14.2 0.8–27.6 8.4 5.2–11.5
 Yes 15.1 0–38.7 5.7 0.8–10.7
 NA 10.3 3.3–17.4 5.1 2.0–8.1

Osteosarcoma component 0.801 0.669
 No 12.3 6.7–17.9 6.6 2.7–10.4
 Yes 19.0 5.2–32.8 6.4 3.6–9.2

UPS component 0.908 0.596
 No 14.2 4.3–24.0 6.1 4.6–7.6
 Yes 12.8 3.4–22.2 8.8 4.1–13.5

Size of dedifferentiated component 0.172 0.038
 Microscopic 27.4 0–70.4 56.9 0–147.8
 Macroscopic 12.3 8.5–16.0 6.1 4.8–7.4

Surgical margin 0.015 0.028
 R0 19.1 8.5–29.8 8.4 5.5–11.3
 R1/R2 12.3 6.1–18.5 6.6 4.2–9.0
 No surgery 6.6 1.5–11.7 3.2 1.7–4.8

Surgery 0.056 0.045
 No 6.6 1.5–11.7 3.2 1.7–4.8
 Yes 15.1 8.1–22.0 8.0 5.5–10.6

Radiation therapy 0.787 0.903
 No 13.1 8.7–17.6 7.2 4.6–9.8
 Yes 14.2 0.6–27.7 5.9 1.4–10.4

Chemotherapy 0.205 0.451
 No 10.4 5.1–15.8 5.5 4.1–6.9
 Yes 23.3 5.6–41.1 9.0 6.5–11.4

AJCC, American Joint Committee on Cancer, 7th edition; CI, confidence interval; NA, not available; UPS, undifferentiated pleomorphic sarcoma.