Table 3 Predictive values
Predicted and measured CBV values | Value (95% CI) |
|---|---|
Predicted hypovolaemia and measured hypovolaemia (CBV <60 ml/kg) | |
   Prior probability | 0.44 (0.39 to 0.49) |
   Sensitivity | 0.10 (0.06 to 0.16) |
   Specificity | 0.87 (0.81 to 0.91) |
   Positive predictive value | 0.37 (0.23 to 0.53) |
   Negative predictive value | 0.55 (0.49 to 0.61) |
Predicted hypovolaemia and measured severe hypovolaemia (CBV <50 ml/kg) | |
   Prior probability | 0.18 (0.14 to 0.23) |
   Sensitivity | 0.10 (0.04 to 0.20) |
   Specificity | 0.88 (0.83 to 0.91) |
   Positive predictive value | 0.15 (0.06 to 0.30) |
   Negative predictive value | 0.82 (0.77 to 0.86) |
Predicted hypervolaemia and measured hypervolaemia (CBV >80 ml/kg) | |
   Prior probability | 0.15 (0.12 to 0.20) |
   Sensitivity | 0.06 (0.01 to 0.16) |
   Specificity | 0.85 (0.80 to 0.89) |
   Positive predictive value | 0.06 (0.02 to 0.19) |
   Negative predictive value | 0.83 (0.78 to 0.87) |