a marginal trendP = 0.07
In patients with poorly differentiated tumors, the difference in OS between the low- and high-FSL score groups did not reach statistical significance (HR 1.42, 95% CI 0.92–2.20; P = 0.11), although a marginal trend was noted for RFS (HR 1.50, 95% CI 0.97–2.34; P = 0.07).