Question

What is the difference between body composition reference methods and anthropometric field methods?

		Both methods capture the same data
		Anthropometric field methods can be used as the gold standard for true body composition while reference methods are compared to that gold standard
		Reference methods are biologically-based, objective measures while field measures are mostly based on self-reported data collected in the field
		Anthropometric measures are typically more expensive than reference methods

All of the following are advantages of CT and MRI methods to measure body composition except:

		Most accurate methods for ascertaining fat distribution at the tissue-organ level
		Neither method exposures subjects to ionizing radiation, making them safe for children and pregnant women
		Measurements are highly reproducible
		Both measures have very high agreement with each other

3. Which of the following is a limitation of BMI? (This question can be more than one answer choice)

		In children normal growth makes causes greater increases in lean body mass than fat mass, making BMI an inappropriate measure
		Changes in body composition due to aging limits the validity of BMI as a marker of body fatness in older adults
		Extremely athletic individuals with high lean body mass have high BMIs that do not accurately reflect body fatness
		All of the above

4. Why do researchers tend to include both BMI and waist circumference or weight-height ratio in the same regression model?

		To compare the effects of overall adiposity and central or abdominal adiposity
		To measure body composition more accurately
		To calculate an alternative measurement for BMI
		Regression models without waist circumference or weight-height ratio generate errors

Answer 1

1. Correct answer:- (c) Reference methods are biologically-based, objective measures while field measures are mostly based on self-reported data collected in the field.

2. Correct answer:- (b) Neither method exposures subjects to ionizing radiation, making them safe for children and pregnant women.

3. Correct answer:-(d) all of the above
Explanation- BMI have following limitations:-
-children normal growth makes causes greater increases in lean body mass than fat mass, making BMI an inappropriate measure.
-Changes in body composition due to aging limits the validity of BMI as a marker of body fatness in older adults.
-Extremely athletic individuals with high lean body mass have high BMIs that do not accurately reflect body fatness.

4. Correct answer:- (a) compare the effects of overall adiposity and central or abdominal adiposity.