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Table 6 Area under the receiver operating characteristic curve to predict the 90-day mortality for each model

From: The Surgical Apgar Score can help predict postoperative complications in femoral neck fracture patients: a 6-year retrospective cohort study

Category variables AUC
 Preoperative factor
  ASA classification ≥ 3 0.70
  The significant and marginally significant risk factors (p value < 0.1) 0.77
   Low body mass index (≤ 20)
   Low albumin concentration (< 3.5 g/dl)
   Moderate to severe valvular heart disease
   Chronic obstructive pulmonary disease
   Rheumatoid arthritis
 The significant risk factors (p value < 0.05) 0.78
  Low body mass index (≤ 20)
  Low albumin concentration (< 3.5 g/dl)
  Moderate to severe valvular heart disease
 Intraoperative factor
  Lowest MAP < 55 mmHg 0.65
  Lowest MAP < 55 mmHg and lowest heart rate ≥ 60 beats per min 0.68
  SAS value ≤ 6 0.71
 Combination of preoperative and intraoperative factor
  SAS value ≤ 6 combined with ASA classification ≥ 3 0.81
  SAS value ≤ 6 combined with the significant and marginally significant risk factors 0.84
  SAS value ≤ 6 combined with the significant risk factors 0.85
Continuous variables AUC
 ASA classification 0.70
 SAS value 0.76
  1. AUC area under the receiver operating characteristic curve, MAP mean arterial pressure, SAS Surgical Apgar Score