Table 2:

Results of the final model of multivariable Cox proportional hazards regression among all patients (n = 261) after propensity matching

Variables	HR (95% CI)	P-value
Age (years) (n = 261)	1.016 (1.01–1.03)	0.001a
Grade
Low/intermediate (n = 36)	Ref
High (n = 183)	1.893 (1.09–3.28)	0.023a
Pulmonary metastasectomy
No (n = 164)	Ref
Yes (n = 55)	0.536 (0.34–0.85)	0.008a
T stageb
T1 (n = 37)	Ref
T2/3 (n = 182)	1.499 (0.86–2.61)	0.15
Chemotherapyc
No/unknown (n = 48)	Ref
Yes (n = 171)	0.569 (0.35–0.92)	0.021a
Radiationc
None (n = 163)	Ref
Yes (n = 56)	0.717 (0.47–1.10)	0.13

Frequencies for each variable are indicated. Cases with missing survival data excluded.

^aSignificant.

^bAJCC 7th edition staging for primary sarcoma.

^cAdjuvant and/or neoadjuvant with respect to the primary disease.

CI: confidence interval; HR: hazard ratio; Ref: reference variable.