borderline significantP = .02
Univariate analysis of overall survival using the Cox model showed that stage ( P < .001), CA19-9 levels ( P = .004), and CRHR1 status ( P = .038) were significant factors, and the subsequent multivariate analysis revealed that of these, stage and postoperative CA19-9 levels were borderline significant factors ( P = .02 and .001, respectively) without multicollinearity ( Table 3 ).