Table 4.

Estimation of the hazard ratio for disease-free survival

Study	HR estimation	Co-factors	Analysis results
Fleischmann [18]	HR, 95 % CI	Extracapsular extension, no. of positive LNs	Not significant
Guzzo [22]	HR, 95 % CI	Age, sex, diversion type, pT stage, adjuvant chemotherapy	Not significant
Jensen [25]	HR, 95 % CI	Age, sex, pT stage, pN stage, metasis above the aortic bifurcation, extracapsular extension, volume dependent LN density, diameter of largest LN, volume of metastatic LNs	Not significant
Masson-Lecomte [28]	HR, 95 % CI	pT stage, lymphovascular invasion, extracapsular extension, adjuvant chemoethrapy	Significant
Mmeje [29]	P value, event no. (univariate)	-	Not significant
Kwon [30]	HR, 95 % CI	pT stage, pN stage, no. of positive LNs, adjuvant chemotherapy	Not significant

HR: hazard ratio, CI: confidence interval, LN: lymph node