**Proportional Mortality Rate**

**Core Concept**
The proportional mortality rate (PMR) is a statistical measure used to assess the proportion of deaths due to a specific cause within a population. It is expressed as a percentage and is calculated by dividing the number of deaths due to a particular cause by the total number of deaths in a given period.

**Why the Correct Answer is Right**
The PMR is a useful tool for public health officials to track the impact of various diseases on a population. By calculating the PMR, healthcare professionals can identify the leading causes of death and allocate resources accordingly. The PMR is calculated using the following formula: (Number of deaths due to a specific cause / Total number of deaths) x 100.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it refers to the crude death rate, which is the total number of deaths per 1,000 population per year, not the proportion of deaths due to a specific cause.
**Option B:** This option is incorrect because it refers to the case-fatality rate, which is the proportion of deaths among those with a specific disease, not the proportion of deaths due to that disease in the overall population.
**Option C:** This option is incorrect because it refers to the mortality rate, which is the number of deaths per 1,000 population per year, but does not account for the proportion of deaths due to a specific cause.

**Clinical Pearl / High-Yield Fact**
Remember that the PMR is a useful tool for identifying leading causes of death and allocating resources, but it should be interpreted in conjunction with other epidemiological measures, such as the age-adjusted death rate and the life expectancy at birth.

**Correct Answer:** C. The proportion of total deaths due to a specific cause.