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Table 2 Predictive value of MCI compared to cognitively normal or depressed for the emergence of dementia within a period of two years

From: Progression and improvement after mild cognitive impairment

      Predictive value
  Numbers Sensitivity Specificity PPV NPV Relative risk
Baseline MCI yes no      
Demented at follow-up yes no yes no      
MCI versus normal 9 15 15 95 38
(20-59)
86
(78-92)
38
(20-59)
86
(78-92)
2.75
(1.37-5.53)
MCI versus normal or depressed 9 15 20 112 31
(16-51)
88
(81-93)
38
(20-59)
85
(77-90)
2.48
(1.29-4.77)
  1. PPV = positive predictive value
  2. NPV = negative predictive value