The purposes of this paper were to classify and describe the
types of high risk population through the test of apolipoprotein E
among rural populations. The gene for human apolipoprotein E has
been found on the long arm of chromosome 19 and exists in three
common allelic forms, E2, E3, and E4. The E4 allele is represented
in Alzheimer's disease (AD) and is known as genetic risk factor
for AD. Data were collected from 200 voluntary participants who
aged from 35 up to 80 years. The risk group consists of 32 people
(16% of the sample) who have APOE-E4 gene and have over 70%
possibility of developing the AD. The higher risk group among the
32 people can be classified into four types: the group with the
family history of dementia (n = 2), the group with vascular disease
(n = 7), the group with diabetes mellitus (n = 5), and the group
who are older than 60 years old (n = 6).