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

Table 3

Systemic chemotherapy-free interval in sarcoma patients undergoing ablation.

Variable	Univariate		Multivariate
	Median (months)		Model coefficient	95% CI	Hazard ratio
Sex		0.71
Male	10.9
Female	14.7
Age		0.95
>50 years	20.1
<50 years	8.8
Tumour size		0.19
≤3 cm	20.1
>3 cm	6.9
Index tumour grade		0.44
High	14.7
Low	10.9
Histologic subtype		0.017	–0.03	0.83–1.15	0.97	0.758
Leiomyosarcoma	10.4
GIST	6.9
Liposarcoma	Not reached
Chondrosarcoma	24.5
Other	9.4
Failed previous chemotherapy		<0.0001	–1.90	0.08–0.30	0.15	<0.0001
No	66.8
Yes	6.1
Disease-free interval		0.29
<12 months	10.9
>12 months	46.3

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