Table 2.

Multivariate analysis of clinical and pathologic variables associated with disease-specific survival (DSS) and distant recurrence-free survival (DRFS) for the entire cohort and for the subset with myxofibrosarcoma.

Variable	DSS		DRFS
	Multivariate HR (95% CI)	p-value	Multivariate HR (95% CI)	p-value
Myxofibrosarcoma and UPS (n=197)
% Myxoid component (<5% vs. ≥5%)	2.1 (1.4–3.2)	0.001	2.5 (1.7–3.8)	<0.001
Size (≥10 cm vs. <10 cm)	2.2 (1.4–3.4)	<0.001	2.2 (1.4–3.2)	<0.001
Age (≥65 vs. <65)	1.6 (1.1–2.5)	0.025	1.1 (0.7–1.6)	0.73
Myxofibrosarcoma only (n=128)
% Myxoid component (<70% vs. ≥70%)	2.1 (1.2–3.9)	0.015	2.7 (1.5–4.8)	0.001
Size (continuous)	1.11 (1.05–1.16)	<0.001	1.12 (1.07–1.17)	<0.001

HR, hazard ratio