Table 2:

Results of univariable and multivariable analyses for disease-free survival and thymoma-related survival

	Disease-free survival			Thymoma-related survival
	Univariable	Multivariable		Univariable	Multivariable
	P-Value	HR (95% CI)	P-Value	P-Value	HR (95% CI)
Age (<56 versus ≥56) years	0.90	–	–	0.98	–
Gender (M versus F)	0.75	–	–	0.14	–
Charlson index (0–2 versus 3–7)	0.35	–	–	0.29
WHO histology (A, AB, B1 versus B2, B3)	<0.001	5.5 (2.0–15.0)	0.001	0.16	–
Masaoka stage (I versus II, III)	0.010	–	0.93	0.99	–
Tumour size (<63 versus ≥63) mm	0.024	–	0.16	0.22	–
Extent of resection (thymomectomy versus thymectomy)	0.12	–	–	0.38	–
Surgical approach (minimal versus open)	0.69	–	–	0.69	–
Residual tumour (absent versus present)	<0.001	7.5 (2.7–21.0)	<0.001	0.95	–
Chemotherapy (none versus adjuvant)	<0.001	1.6 (1.0–2.6)	0.048	0.93	–
Radiotherapy (none versus adjuvant)	0.18	–	–	0.36	–

F: female; CI: confidence interval; HR: hazard ratio; M: male; WHO: World Health Organization.