Sullivan index is an index for –
**Core Concept**
The Sullivan index is a measure used in **public health** and **epidemiology** to quantify the impact of **disability** and **mortality** on a population. It is a type of **health expectancy** metric.
**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the Sullivan index in general. The Sullivan index, also known as the **disability-free life expectancy (DFLE)**, estimates the average number of years a person is expected to live without **disability**. This index is crucial for understanding the **health status** and **quality of life** of a population.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we cannot provide a direct explanation for its incorrectness.
**Option B:** Similarly, without the details of option B, we cannot explain why it is incorrect.
**Option C:** Option C's incorrectness would depend on its specifics, which are not provided.
**Option D:** The same applies to option D.
**Clinical Pearl / High-Yield Fact**
The Sullivan index is a valuable tool for **health planners** and **policy makers** to assess the **effectiveness of healthcare interventions** and allocate resources accordingly. Remember, **health expectancy** metrics like the Sullivan index provide insights into the **quality of life**, not just **life expectancy**.
**Correct Answer:** Correct Answer: D. Life expectancy free from disability