showed a trendp = 0.058
Interestingly, although the levels of CA 19 − 9 after surgery were not significantly associated statistically with both recurrence and survival, the results showed a trend towards affecting the outcomes [DFS: HR: 2.00, 95% Confidence Interval (CI): 0.98–4.10, p = 0.058; OS: HR: 1.94, 95% Confidence Interval (CI): 0.89–4.22, p = 0.094] (Table 2 ).