Question

The Chinese Mini-Mental Status Test (CMMS) consists of 114 items intended to identify people with Alzheimer’s disease and senile dementia among people in China [14]. An extensive clinical evaluation of this instrument was per- formed, whereby participants were interviewed by psychia- trists and nurses and a definitive diagnosis of dementia was made. Table 3.13 shows the results obtained for the subgroup of people with at least some formal education.

Suppose a cutoff value of ≤ 20 on the test is used to identify people with dementia.

Calculate positive predictive value and negative predictive value.

TABLE 3.13 Relationship of clinical dementia to outcome on the Chinese Mini-Mental Status Test CMMS score Nondemented Demented 0-5 6-10 11-15 16-20 21-25 26-30 Total 0 0 3 2 4 16 18 46 3 16

Answer 1