The cause-specific mortality rate from roller-skating was:

Understand the Problem

The question is asking for the cause-specific mortality rate from roller-skating injuries in Metroville using the provided data, focusing on the correct formula to calculate this rate.

Answer

The cause-specific mortality rate from roller-skating injuries is $5,000$.

Steps to Solve

Identify the formula for cause-specific mortality rate The cause-specific mortality rate can be calculated using the formula:

$$ \text{Mortality Rate} = \left( \frac{\text{Number of deaths from the specific cause}}{\text{Total number injured from that cause}} \right) \times 100,000 $$

Substitute the values into the formula From the data provided:

Number of deaths from roller-skating: 90
Total number of residents injured from roller-skating: 1,800

Using the formula, we substitute these values:

$$ \text{Mortality Rate} = \left( \frac{90}{1800} \right) \times 100,000 $$

Calculate the mortality rate Now, divide 90 by 1800 and multiply by 100,000:

$$ \text{Mortality Rate} = \left( \frac{90}{1800} \right) \times 100,000 = 0.05 \times 100,000 = 5,000 $$

The cause-specific mortality rate from roller-skating injuries in Metroville is:

$$ 5,000 $$

More Information

The cause-specific mortality rate helps to quantify the risk associated with specific causes of injury or disease in a population. In Metroville, the calculated rate indicates that for every 100,000 residents injured in roller-skating, there are 5,000 deaths attributed to it.

Tips

A common mistake is confusing the total number of deaths with the number of deaths from a specific cause. Make sure to always use the number that is directly linked to the cause being examined.
Remember to multiply by 100,000 to express the mortality rate per 100,000 individuals, which is a common reporting standard in epidemiology.

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