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Perioperative hemoglobin area under the curve is an independent predictor of renal failure after cardiac surgery. Results from a Spanish multicenter retrospective cohort study

Fig 1

Calculation of perioperative hemoglobin area under the curve (AUC).

Hb1: Preoperative hemoglobin

Hb2: Intraoperative hemoglobin

Hb3: Postoperative hemoglobin

AUC = Area 1 + Area 2, AUC = (A+B) + (C+D)

AUCs formula: AUCs = k (Hb1/2+Hb2+Hb3/2)

Fig 1

doi: https://doi.org/10.1371/journal.pone.0172021.g001