Table 1.
Association of Initial Vital Signs and SmO2 With 24‐Hour RBC Transfusion Volume ≥ 3 Units
| Median (IQR) for Patients With 24‐Hour RBC Volume < 3 Units (n = 464) | Median (IQR) for Patients With 24‐Hour RBC Volume ≥ 3 Units (n = 23) | ROC AUCs (95% CIs) | |
|---|---|---|---|
| HR (beats/min) | 83 (70–96) | 99 (82–119) | 0.70 (0.56–0.81) |
| sBP (mm Hg) | 141 (127–158) | 136 (96–147) | 0.62 (0.47–0.75) |
| PP (mm Hg) | 61 (50–73) | 48 (33–63) | 0.68 (0.54–0.80) |
| SI ([beats/min]/[mm Hg]) | 0.59 (0.49–0.70) | 0.80 (0.63–0.94) | 0.75 (0.61–0.85) |
| SmO2 (%) | 67 (62–72) | 61 (50–64) | 0.76 (0.65–0.84) |
HR = heart rate; IQR = interquartile range; PP = pulse pressure (= sBP – diastolic blood pressure); RBC = packed red blood cells; ROC AUC = area under the receiver operating characteristic curve; sBP = systolic blood pressure; SI = shock index (= HR/sBP); SmO2 = muscle oxygen saturation.