Results for Case #2

• Laitest D-Dimer > or = to 500 ng/ml

  • Sensitivity: 100% (97-100% ( 95% CI))
  • Specificity: 35% (29%-41%)
  • Positive Predictive Value: 48% (42%-54%)
  • Negative Predictive Value: 100% (94%-100%)
    Source: Am Journal of Resp. and Critical Care Medicine. 1998, Vol. 158

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Likelihood ratios comment on the magnitude of which the test result in question strengthens the clinical assessment

Likelihood ratio: how much that result will raise or lower the probability of disease