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Introduction to Epidemiology
Question 1: At a dinner party, a total of 125 people ate the roasted chicken. Among them,
45 who consumed roasted chicken became ill while the others were healthy. Calculate the
The attack rate is computed by dividing the total number of persons exposed to the risk factor,
which in this example is roasted chicken, by the number of people who fell ill. Typically, the
assault rate is reported as a percentage.
We may use the following method to compute the attack rate for this outbreak:
Attack rate = (Number of people who became ill) / (Total number of people exposed) * 100
Attack rate = 45 / 125 * 100 = 36%
As a result, the outbreak’s attack rate is 36%. This suggests that 36% of those who ate the roasted
chicken became sick.
It is vital to emphasize that the attack rate is only one indicator of illness risk. Other
considerations, such as the severity of the sickness or the amount of time the individual has been
unwell, are not considered.
Question 2: In a university, there are 2100 students, 1400 are boys and 700 are girls. What
is the sex ratio?
The sex ratio measures the proportion of men to females in a population. It is computed by
dividing the total number of men by the total number of females and multiplying by 100.
The sex ratio can be computed for a whole population or for specific subgroups, such as distinct
age groups, ethnic groupings, or socioeconomic groups. The sex ratio can also be computed for
various geograp …
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