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

Table 4

Cytotoxic chemotherapy-free interval in sarcoma patients undergoing ablation.

Variable	Univariate		Multivariate
	Median (months)		Model coefficient	95% CI	Hazard ratio
Sex		0.79
Male	81.3
Female	46.7
Age		0.65
>50 years	81.3
<50 years	Not reached
Tumour size		0.16
≤3 cm	81.3
>3 cm	34.3
Index tumour grade		0.78
High	Not reached
Low	81.3
Histologic subtype		0.034	–0.03	0.78–1.19	0.97	0.751
Leiomyosarcoma	28.1
GIST	Not reached
Liposarcoma	Not reached
Chondrosarcoma	Not reached
Other	81.3
Failed previous chemotherapy		<0.0001	−1.92	0.06–0.36	0.15	<0.0001
No	Not reached
Yes	12.2
Disease-free interval		0.34
<12 months	81.3
>12 months	Not reached

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