Table 4. Multivariate analysis results in terms of recurrence-free survival and overall survival.

	Recurrence free survival			Overall survival
	HR	95% CI	p	HR	95% CI	p
Age	1.001	0.966-1.036	0.975	1.013	0.978-1.049	0.466
Sex	0.842	0.310-2.285	0.736	1.755	0.540-5.707	0.350
Tumor type (primary/secondary)	1.380	0.252-7562	0.711	3.055	0.299-31.204	0.346
Tumor pathology (carcinoma/sarcoma)	1.007	0.145-6.995	0.994	2.048	0.163-25.742	0.579
Grade	2.443	1.312-4.549	0.005	2.032	1.005-4.109	0.048
Stage	0.939	0.511-1.725	0.839	0.762	0.396-1.467	0.417
Resection margin	1.749	0.532-5.749	0.357	1.863	0.643-5.399	0.252
Rib resection	0.066	0.016-0.278	<0.001	0.128	0.029-0.566	0.007
Neoadjuvant treatment	1.308	0.503-3.404	0.582	1.044	0.387-2.812	0.932
Adjuvant treatment	2.737	0.530-14.135	0.229	1.997	0.405-9.838	0.395
HR: Hazard ratio; CI: Confidence interval.