a positive trendp = 0.001
In contrast, the calculated FRL had a positive correlation with postoperative C4 levels in controls and a positive trend in patients with pCCA (0.22, 95% CI [0.09, 0.35], p = 0.001 vs. 0.23, 95% CI [−0.01, 0.455], p = 0.056) (Figure 4 A).