What is the primary purpose of Body Mass Index (B.M.I.)? Choose the best answer.

Question

BlackTom AI · Accepted Answer

BMI is calculated as weight in kilograms divided by height in meters squared (BMI = kg/m^2), so it is inherently a simple ratio that standardizes weight for height. For example: a person weighing 70 kg and 1.75 m tall has BMI = 70 ÷ (1.75 × 1.75) = 70 ÷ 3.0625 = 22.86. This illustrates why BMI is easy to compute and compare across large groups.

1) Relevant knowledge points and concepts
- BMI (Body Mass Index) is an anthropometric index developed by Adolphe Quetelet as a population-level tool.
- It is a proxy for relative weight, not a direct measurement of body composition or health.
- Epidemiology values simple, inexpensive, repeatable measures for comparing populations and tracking trends.

2) Step-by-step reasoning
- The formula shows BMI needs only weight and height—both easily and cheaply measured.
- Because it is quick and standardized, BMI is suitable for large-scale studies, surveillance, and risk stratification in populations.
- Its limitations (no differentiation between fat and lean mass, no information on fat distribution or metabolic health) make it unsuitable as a definitive individual diagnostic tool.

3) Intermediate calculation example (shown above) demonstrates simplicity: measure weight and height, square height, divide weight by squared height.

4) Why the correct answer is correct
- The statement “To provide a simple and cost-effective tool for epidemiological research” matches BMI’s intended and practical use: monitoring obesity prevalence, correlating BMI categories with disease risk across populations, and enabling public health comparisons.

5) Why other options are incorrect
- “To determine a person's true body composition.” Incorrect because BMI cannot distinguish fat vs. muscle or bone mass.
- “To accurately measure the percentage of body fat an individual possesses.” Incorrect; accurate body fat requires DEXA, hydrostatic weighing, or validated bioelectrical impedance/skin-fold methods.
- “To accurately measure an individual's health status.” Incorrect; health depends on many factors (metabolic markers, fitness, distribution of fat) that BMI does not capture.

6) Conclusion
The correct answer is “To provide a simple and cost-effective tool for epidemiological research,” which aligns with the provided answer.

What is the primary purpose of Body Mass Index (B.M.I.)? Choose the best answer.Single choice

Similar Questions

If a male has a BMI of 24.9 then he would be classified as

Which body composition measurement uses height and weight measurements?

What is one of the main reasons why B.M.I. has remained widely entrenched in medical assessments?

Which of the following is a short and/or long term result of dehydration? Choose one or more of the following.

Why is the American Medical Association’s new policy regarding B.M.I. considered a significant shift in medical practice?

Why might some people feel more energetic on a cleanse, according to registered dietitian Beth Czerwony as discussed in the New York Times article The Sneaky Allure of a Detox?

According to the New York Times article The Sneaky Allure of a Detox, why do some people report feeling better while on a cleanse, even though there is little scientific evidence to support cleanses' specific benefits?

What is the main premise behind the promotion of liquid diets and cleanses, as described in the New York Times article The Sneaky Allure of a Detox?

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler