Analysis of the Chemotherapy-Free Interval following Image-Guided Ablation in Sarcoma Patients

Table 2

Overall survival in sarcoma patients undergoing ablation.

Variable	Univariate		Multivariate
	Median (months)		Model coefficient	95% CI	Hazard ratio
Sex		0.36
Male	49.6
Female	53.1
Age		0.92
>50 years	52.4
<50years	55.9
Tumour size		0.033	0.54	0.87–3.38	1.72	0.1159
≤3 cm	53.1
>3 cm	31.6
Index tumour grade		0.19
High	53.1
Low	Not reached
Histologic subtype		0.17
Leiomyosarcoma	55.9
GIST	78.1
Liposarcoma	Not reached
Chondrosarcoma	24.3
Other	46.9
Failed previous chemotherapy		0.027	−0.56	0.31–1.06	0.57	0.0749
No	62.6
Yes	33.2
Disease-free interval		0.87
<12 months	52.4
>12 months	55.7

Log-rank tests of no differences among categories vs. any differences among categories.