Fig. 7

Kaplan–Meier estimates of postoperative LOS according to preoperative AFR status (cut-off 10.34) in two high-risk subgroups. (A) Patients who developed severe postoperative complications (Clavien–Dindo ≥ III) but were ultimately discharged (n = 23;p = 0.00083). (B) Patients who required unplanned ICU admission after surgery (n = 31;p = 0.015).