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Table 3 Analysis of SIPA thresholds ability to predict massive transfusion and death

From: Validation of the age-adjusted shock index for pediatric casualties in Iraq and Afghanistan

Variable Age/Threshold Sensitivity Specificity PPV NPV
Massive transfusion 1–3 years /SIPA 1.2 0.73 0.35 0.18 0.87
4–6 years /SIPA 1.2 0.63 0.60 0.23 0.89
7–12 years /SIPA 1.0 0.80 0.57 0.25 0.94
13–17 years /SIPA 0.9 0.77 0.62 0.29 0.93
Death 1–3 years /SIPA 1.2 0.75 0.34 0.90 0.94
4–6 years /SIPA 1.2 0.66 0.59 0.14 0.94
7–12 years /SIPA 1.0 0.64 0.52 0.09 0.95
13–17 years /SIPA 0.9 0.70 0.57 0.08 0.97
  1. SIPA Shock index pediatric age-adjusted; PPV Positive predictive value; NPV Negative predictive value