Which statement best describes the interpretation of proportionate mortality rate?

• A. It directly estimates the risk of dying from the disease in the population
• B. It describes the share of deaths due to a specific cause among all deaths, not the risk
• C. It measures the rate of new cases per year
• D. It is the same as life expectancy

Answer: (B)

Proportionate mortality rate expresses the share of deaths from a specific cause within all deaths. It is calculated as deaths from the cause divided by total deaths and is usually shown as a percentage. This tells you how important that cause is among all deaths, not how likely people are to die from it in the population. It doesn’t account for how many people are at risk, how long they are at risk, or deaths from other causes, so it can’t be interpreted as the risk of dying from that cause. It’s also not a measure of new cases per year (incidence) nor a measure of overall lifespan (life expectancy). For example, if 200 of 1,000 total deaths are due to a specific cause, the proportionate mortality rate for that cause is 20%, which describes the share, not the individual risk.