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Table 4 Predictive value of scoring systems

From: Shock index in patients with traumatic solid organ injury as a predictor of massive blood transfusion protocol activation

  MTP Blood transfusion Exploratory Laparotomy Mortality
Shock Index (≥0.8)
 Sensitivity 85.1% 73.1% 59.1% 82%
 Specificity 54.6% 65.6% 52.9% 52.5%
 Positive Predictive value 21.8% 60.2% 33.6% 14.2%
 Negative Predictive value 96.1% 77.4% 76.3% 96.8%
 Positive likelihood ratio 1.87 2.12 1.25 1.72
 Negative likelihood ratio 0.27 0.41 0.77 0.34
Shock Index (≥0.9)
 Sensitivity 75.7% 59.7% 46.3% 70%
 Specificity 70.5% 81.7% 68.9% 67.8%
 Positive Predictive value 27.6% 70% 37.4% 17.2%
 Negative Predictive value 95.1% 74% 76.2% 95.9%
 Positive likelihood ratio 2.56 3.26 1.48 2.17
 Negative likelihood ratio 0.34 0.49 0.77 0.44
Shock Index (≥1.0)
 Sensitivity 63.5% 47.9% 36% 62%
 Specificity 79.1% 88.9% 77.5% 77%
 Positive Predictive value 31.1% 75.5% 39.1% 20.5%
 Negative Predictive value 93.6% 70.5% 75.1% 95.5%
 Positive likelihood ratio 3.03 4.31 1.6 2.69
 Negative likelihood ratio 0.46 0.58 0.82 0.49
ABC Score
 Sensitivity 44.9% 28.1% 32% 45.5%
 Specificity 90.2% 95.7% 92.6% 88.5%
 Positive Predictive value 40.8% 82.9% 63.2% 26.3%
 Negative Predictive value 91.6% 64.5% 77.5% 94.7%
 Positive likelihood ratio 4.58 6.53 4.32 3.95
 Negative likelihood ratio 0.61 0.75 0.73 0.61