The relative number

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natural growth rate - number of live births in a particular year - number of deaths / Average population in the same year in that place ×1000 per 1,000 - birth rate - mortality rate

indicates an increase in population per year.

Structure Relatives - The sum of the number of cases / the number of cases of each component×100 (3.2)

The sum of the relatives of the group structures within the whole should be 100%.

e.g. the number of malaria cases in a certain area in a certain year is: 68 cases of Falciparum malaria, 12 per day, 17 malaria on three days. The percentage of the total number of malaria patients for each of the three types is:

Falciparum Malaria: 68/ (68 12 17) ×100% - 70.1 %

-day malaria s 12/ (68 12 17) ×100% s 12.4%

three-day malaria s 17 / (68 12 17) s 17.5%

the percentage of each part is 100%, i.e. 70.1% 12.4% 17.5% s 100%

(iii) compared relative number (ratio) is the ratio of the two relevant indicators. Usually the number of one phenomenon is 1 or 100 as a base, depending on the number of another phenomenon. The calculation formula is:

compares the relative number of A phenomenon / the number of phenomena (3.3)

for example, a place from 1 Between 972 and 1976, there were 2,209 cases of liver cancer in men and 735 in women, 3.005 times that of men, or

/Female: 2209/735, 3.005

can also be written as: Male: Female: 2209:735, 3. 005:1

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and as follows: dynamic relative number is also a comparative number, indicating the same phenomenon at different times of comparison, such as Table 3.1 for a hospital to receive the total number of patients change.