RIF1 and ovarian cancer: Kaplan–Meier survival curves and log-rank test survival analysis demonstrated that overexpression of RIF1 mRNA was associated with worse overall survival (RIF1 low vs high expression patients: hazard ratio [HR] of survival =1.24, 95% confidence interval [CI] =1.09 to 1.41, P = 0.0012) (Fig. 1g) and progression-free survival of ovarian cancer patients (RIF1 low vs high expression patients: hazard ratio [HR] of survival = 1.4, 95% confidence interval [CI] = 1.22 to 1.6, P < 0.0001) (Fig. 1h).