Factors affecting oncological outcomes
We performed multivariate analysis with Cox models to identify factors
associated with OS and 5-year DFS (Table 4). This analysis of multiple
factors (gender, age, smoking, alcohol abuse, clinical T stage, surgery
pattern, involvement of anterior commissure, and resection margins)
indicated that only type of surgery had a significant impact on 5-year
DFS (P = 0.02; HR: 6.35, 95% CI: 1.31 to 30.74). Involvement of the
anterior commissure had no significant impact on outcome.