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Table 2 Diagnostic validity by optimal cut-off points, in the present study and as defined by the authors of the instruments

From: Diagnostic validity of the STRATIFY and Downton instruments for evaluating the risk of falls by hospitalised acute-care patients: a multicentre longitudinal study

  STRATIFY
Cut point = 1
STRATIFY
Cut point = 2
DOWNTON
Cut point = 2
DOWNTON
Cut point = 3
Sensitivity 47.6% 41.0% 66.7% 58.0%
Specificity 85.0% 84.0% 55.3% 54.0%
PPV 10.9% 1.8% 5.50% 0.90%
NPV 97.7% 99.5% 97.7% 99.5%
LR+ 3.18 2.6 1.49 1.28
LR- 0.61 0.69 0.60 0.76
  1. PPV positive predictive value, NPV negative predictive value, LR likelihood ratio