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