The Waist to Height Ratio (WHtR), also known as waist-to-stature ratio (WSR), is a straightforward measurement of body composition and a commonly used screening tool for obesity. Unlike Body Mass Index (BMI), which is based on height and weight measures, WHtR is determined by waist girth (circumference) and standing height. Research suggests that WHtR is equivalent to or slightly better than waist circumference and superior to BMI in predicting higher cardiometabolic risk (Yoo, 2016).
Purpose
The purpose of WHtR is to determine the ratio of height to waist circumference. It provides valuable insights into an individual’s body composition.
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Equipment Required
To measure WHtR, you will need a tape measure and a stadiometer.
Procedure
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The calculation for WHtR involves dividing the waist girth by the height measurement. The waist circumference should be taken at the midpoint between the lower border of the rib cage and the top of the iliac crest. It’s important to use the same units of measurement for consistency.
Waist to Height Ratio (WHtR) = Waist Girth / HeightScoring
A generally acceptable level is when your waist measurement is less than half your height (e.g., WHtR ratio less than 0.5). Higher values of WHtR indicate a higher risk of obesity-related cardiovascular diseases. The specific units of measurement (e.g., cm or inches) do not matter; it’s the ratio that is important.
Target Population
WHtR is often used to determine the coronary artery disease risk factor associated with obesity.
Advantages
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WHtR is a simple measure that can be easily conducted at home by anyone to monitor their body composition levels.
Other Comments
The basis of using WHtR as a coronary disease risk factor is the assumption that fat stored around the waist poses a greater health risk than fat stored elsewhere in the body.
References
- Yoo, E.-G. (2016). Waist-to-height ratio as a screening tool for obesity and cardiometabolic risk. Korean Journal of Pediatrics, 59(11), 425-431. http://doi.org/10.3345/kjp.2016.59.11.425
- Browning LM, Hsieh SD, Ashwell M. (2010) A systematic review of waist-to-height ratio as a screening tool for the prediction of cardiovascular disease and diabetes: 0·5 could be a suitable global boundary value. Nutr Res Rev. Dec;23(2):247-69.
Similar Tests
- Adiposity Index: Another measure of body composition using the hip circumference and height.
- General procedures for girth measurements.
- Waist girth procedure.
Related Pages
- Other body composition tests and anthropometric tests.
- Measuring body composition.
- Using girth measures to calculate percent body fat.
- Using a MyoTape for girth measurement.
FAQs
Q: How is WHtR different from BMI?
A: WHtR takes into account waist girth and provides better predictions of higher cardiometabolic risk compared to BMI, which considers height and weight measures.
Q: Can I measure my WHtR at home?
A: Yes, WHtR can be easily measured at home using a tape measure and stadiometer.
Q: What is the acceptable level for WHtR?
A: A generally acceptable level is when your waist measurement is less than half your height, indicating a lower risk of obesity-related cardiovascular diseases.
Summary
The Waist to Height Ratio (WHtR) is a simple yet effective screening tool for obesity and cardiometabolic risk. It involves calculating the ratio between waist girth and standing height. A WHtR ratio below 0.5 is generally considered acceptable, indicating a lower risk of obesity-related cardiovascular diseases. WHtR can be measured at home using a tape measure and stadiometer, making it easily accessible for self-monitoring of body composition levels. By considering factors such as waist girth, WHtR provides valuable insights that surpass the predictive capabilities of BMI alone.
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