Table II.

Cox regression analysis of the prognostic values of KL methylation, age at diagnosis, grade and histological subtypes.

Feature	P-value	Standard error value	Relative risk	95% CI
KL methylation (low vs. high methylation)	0.029	0.716	4.758	1.169-19.366
Age at diagnosis (<50 vs. >50 years)	0.843	0.540	1.113	0.386-3.205
Histological subtypes (serous vs. mucinous)	0.470	0.296	1.238	0.693-2.213
Tumor grade (low vs. high grade)	0.140	0.186	1.317	0.914-1.898

KL, Klotho; CI, confidence interval.