Table 4 Cox regression model to assess the risk factors of metachronous recurrence
Factor | Variable | Case No | Hazard ratio | 95% CI | P value |
|---|---|---|---|---|---|
Univariate analysis | |||||
Infiltration depth |  < SM vs. >  = SM | 229 | 0.64 | 0.27–1.49 | 0.297 |
Size of tumor, cm |  < 3 vs. >  = 3 | 229 | 0.73 | 0.40–1.36 | 0.326 |
Lymphovascular involvement |  + vs. - | 229 | 0.32 | 0.04–2.23 | 0.244 |
Age, years |  < 50 vs. >  = 50 | 229 | 0.56 | 0.33–0.94 | 0.027 |
Complete resection |  + vs. - | 229 | 1.17 | 0.59–2.32 | 0.657 |
Lugol background | Few LVLs vs. numerous LVLs | 229 | 2.56 | 1.21–5.41 | 0.014 |
Multivariate analysis | |||||
Age, years |  < 50 vs. >  = 50 | 229 | 0.61 | 0.36–1.04 | 0.067 |
Lugol background | Few LVLs vs. numerous LVLs | 229 | 2.36 | 1.11–5.02 | 0.025 |