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Use of "acute" for children >5 and adults

This question was posted the Prevention and treatment of moderate acute malnutrition forum area and has 1 replies. You can also reply via email – be sure to leave the subject unchanged.

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Tina Lloren

Technical Advisor, Nutrition

Normal user

20 Mar 2015, 16:24

When referring to malnutrition among children >5 years old and adults, as measured by weight-for-height, BMI-for-age, BMI, MUAC, or nutritional edema, should the term "acute " be used, e.g. "moderate acute malnutrition" or simply "moderate malnutrition"? This question has come up as we develop guidelines and training materials.

From our discussion so far, some have said that we are safe to use "acute" when measured by WHZ; that wasting identified by WHZ, MUAC, and nutritional edema are acute conditions, but the acuteness of metabolic changes happens over weeks, sometimes months; that "acute" is avoided in adults because there are too many other primary causes that lead to acute malnutrition as the secondary cause. We have also heard from field-based staff that they would rather have fewer, consistent, harmonized terms to avoid confusion.

Thank you for your help!

Mark Myatt

Consultant Epideomiologist

Frequent user

23 Mar 2015, 11:05

For the children ... there are problems with WHZ and BMI-for-age as these are strongly influenced by body shape and a given threshold may mean different thinks in different populations. I think it is safe to use the term "acute" when there is a rapid loss of weight (could be detected by WHZ, will be detected by MUAC). The term is useful because the conditions referred to are different from chronic conditions such as stunting / stuntedness. These are not either / or conditions. A child can be both stunted and wasted. This is not uncommon.

I think a term such as "moderate undernutrition" is confusing as it is unclear what type of undernutrition is being referred to (I would assume it is "WAZ < -2" in the absence of any clues). I prefer to use terms such as "wasting" and "stunting" ot to refer to the indicator used and in (e.g.) "low H/A" or "HAZ < - 2" to avoid confusion.

The "terms" acute and "chronic" were once in common usage for adults (as in "Acute Energy Deficiency" and "Chronic Energy Deficiency") but have fallen out of favour. I do not like them because they suggest that undernutrition is all about energy rather than (e.g.) micronutrient deficiencies and pathologies. The matter is also complicated by the absence of growth in adults. This means that acute nutrient deficiencies may take much longer to become apparent in adults than in children.

I prefer (as I think you do) the terms "primary" and "secondary". Primary undernutrition develops when nutrient intake is insufficient to provide for normal physiological needs. In adults, primary undernutrition is invariably due to a lack of food in otherwise healthy individuals. Secondary undernutrition occurs when an underlying disease process (for example, HIV/AIDS, TB and cancer) increases metabolic demands and / or decreases food intake or utilisation. The treatment of primary and secondary undernutrition may be quite different.

Just my tuppence.

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