Weight Loss Percentages
1.
Indicators for nutrition intervention:
a. It is involuntary and
b. Exceeds 10% usual body weight in six months or
c. Exceeds 7.5% usual body weight in three months or
d. Exceeds 5% usual body weight in one month
e. Moderate risk BMI 20-23 or greater
f. High risk BMI 20 or less
2.
To calculate % weight loss
a. Substract the new weight from the baseline weight
b. Divide the answer by the baseline weight
c. Multiply the answer by 100
e.g. Take a person who was 48 kg and is now 41 kg
48 - 41 = 7 / 48 = 0.1458 x 100 = 14.58%
3.
To work out BMI (Body Mass Index)
a. Weight in kg divided by Height in metres, squared
e.g. Take our person who is 41 kg and is 1.58 m
1.58 x 1.58 = Ht 2 – 2.496
41 / 2.496 = BMI = 16.42.
4.
Malnutrition Risk (BAPEN)
a. High Risk
i. BMI < 18.5
ii. BMI 18.5-20 & weight loss of 3.2 kg or more in last 6 months
iii. BMI > 20 & weight loss of 6.4 kg or more in last 6 months
b. Medium Risk
i. BMI 18.5-20 & weight loss of less than 3.2 kg in last 6 months
ii. BMI > 20 and weight loss of 3.2-6.4 kg in last 6 months
c. Low Risk
i. BMI > 20 and no weight loss
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