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Table 4 Overall Sensitivity, Specificity, PPV and NPV of the two tools

From: Validation of two nurse-based screening tools for delirium in elderly patients in general medical wards

 

Total (n = 698)

Cardiology (n = 307)

Neurology (n = 391)

DOS

 Sensitivity

0.94 (n = 59/ 63)

1.00 (n = 14/ 14)

0.92 (n = 45/ 49)

 Specificity

0.86 (n = 546/ 635)

0.95 (n = 278/ 293)

0.78 (n = 268/ 342)

 PPV

0.40 (n = 59/ 148)

0.48 (n = 14/ 29)

0.38 (n = 45/ 119)

 NPV

0.99 (n = 546/ 550)

1.00 (n = 278/ 278)

0.99 (n = 268/ 272)

Nu-DESC

 Sensitivity

0.98 (n = 62/ 63)

1.00 (n = 14/ 14)

0.98 (n = 48/ 49)

 Specificity

0.87 (n = 552/ 635)

0.97 (n = 284/ 293)

0.78 (n = 268/ 342)

 PPV

0.43 (n = 62/ 145)

0.61 (n = 14/ 23)

0.39 (n = 48/ 122)

 NPV

1.00 (n = 552/ 553)

1.00 (n = 284/ 284)

1.00 (n = 268/ 269)

  1. PPV Positive Predictive Value, NPV Negative Predictive Value