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Nutrition Assessment: Calculations
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First Exam: Calculations
Terms in this set (35)
BMI formula
Weight (lb) /
Height (inches)*squared (2) x 705
A BMI of <18.5 is...
Underweight
What is a normal range for BMI?
18.5-24.9
What is overweight in terms of BMI?
25.0-29.9
What is the I class of Obesity?
a BMI between 30.0-34.9
What is a BMI of greater than 40.0
The III class of Obesity.
What is the range for the II class of obesity?
35.0-39.9
How do you calculate Ideal Body Weight for a Male? (using the Hamwi method)
first 5ft = 106lb
+1 inch = +6lb
How do you calculate IBW for a female using the Hamwi method?
first 5ft = 100lb
+1 inch= +5lb
Whats the formula for adjusted Ideal Body Weight?
IBW + 0.25(Actual - Ideal) = Adjusted IBW
((Only use if obese, or 30% over IBW))
Whats the formula for %IBW?
Current weight / Ideal weight x 100
Whats the formula for %UBW?
Current weight / Usual weight x 100
If someone's %IBW is over 200, they are...
Morbid obesity
If %IBW = 130-199, they are...
Obese
If %IBW = 110-129, they are..
Overweight
If %IBW = 80-90, they are...
Mild malnutrition
If %IBW = 70-79, they are...
Moderate malnurished
If %IBW is less than 69, they are...
Severe malnurished
If someones %UBW is less than 74...
Severe malnurished
If someones %UBW is between 75-84...
Moderate malnutrition
If someones %UBW is between 85-95...
Mild malnutrition
How do you calculate Percent Change in Body Weight?
Usual - Actual / Usual x 100
What is severe weight loss in one week?
more than 2%
What is severe weight loss in one month?
more than 5%
What is severe weight loss in three months?
more than 7.5%
What is severe weight loss in 6 months?
more than 10%
What is severe weight loss in unlimited time?
more than 20%
How do you change lb to kg?
Divide lb/ by 2.2 = kg
How do you change kg to lb?
Multiply kg by 2.2 = lb
How do you convert inches to cm?
Multiple inches by 2.54 = cm
How do you convert cm to inches?
Divide cm by 2.54 = inches
How much protein should someone under mild stress have?
0.8-1.0g/kg
How much protein for someone under moderate stress?
1.2-2.0g/kg
((or 150kcal/g nitrogen))
How much protein for someone under severe stress?
2.0g/kg
((or 80-100kcal/g nitrogen))
Someone who is healthy has a protein to nitrogen ratio of...
300kcal/g nitrogen
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