TABLE 4.

Predictors of the overall survival of patients with thymoma according to the multivariate Cox proportional hazard model (SII).

Factors	Hazard ratio	95% CI	p‐value
Age	3.34	1.45–7.693	0.005
Tumor size	2.786	1.155–6.72	0.023
Masaoka‐Koga stage	3.124	2.111–4.625	<0.001
SII	5.756	2.144–15.457	0.001

Abbreviations: SII, systemic immune‐inflammation index; WHO, World Health Organization.