Ralston and Myatt reported a number of equations for estimated the weight of a small child based on body measurements. Three are related to estimates based on weight stratified by mid upper arm circumference (MUAC). The authors are from the Uniformed Services University of the Health Sciences in Bethesda and Brixton Healy in Wales.
Patient selection: child 6 to 59 months in a limited-resource setting.
The mid upper arm circumference (MUAC) reflects acute malnutrition.
Parameters:
(1) mid upper arm circumference in mm
(2) height in cm
|
MUAC
|
Acute Malnutrition
|
|
< 115 mm
|
severe
|
|
115 to 124.9 mm
|
moderate
|
|
>= 125 mm
|
no or mild
|
Normal or Mild Acute Malnutrition (MUAC >= 125 mm)
estimated weight in kilograms =
= 7.0724 - (X / 0.8196)
X =
= 12.8984 - (0.1769* (height))
If this is rearranged and consolidated:
estimated weight in kilograms =
= (0.2158 * (height)) - 8.665
Moderate Acute Malnutrition (MUAC 115 to 124.9 mm)
estimated weight in kilograms =
= 11.7344 - (X / 0.8537)
X =
= 19.2019 - (0.2202 * (height))
If this is rearranged and consolidated:
estimated weight in kilograms =
= (0.2579 * (height)) - 10.7582
Severe Malnutrition (MUAC < 115 mm)
estimated weight in kilograms =
= 8.2778 - (X / 0.8779)
X =
= 13.7884 - (0.1802 * (height))
If this is rearranged and consolidated:
estimated weight in kilograms =
= (0.2053 * (height)) - 7.4283
