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Questions and Answers
What is the formula for calculating percent of usual body weight (% UBW)?
What is the formula for calculating percent of usual body weight (% UBW)?
- % UBW = (Current Weight ÷ Usual Body Weight) x 100 (correct)
- % UBW = (Current Weight - Usual Body Weight) x 100
- % UBW = (Usual Body Weight ÷ Current Weight) x 100
- % UBW = (Current Weight x Usual Body Weight) x 100
What is the percent weight change if the % UBW is 75%?
What is the percent weight change if the % UBW is 75%?
-25
Is a weight change of -25 significant over three months?
Is a weight change of -25 significant over three months?
- No
- Yes (correct)
The formula for % Weight Change is % UBW - ______
The formula for % Weight Change is % UBW - ______
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Study Notes
Calculating Percent of Usual Body Weight (% UBW) and Percent Weight Change
- % UBW is applicable to both men and women.
- Formula for % UBW:
- Current Weight ÷ Usual Body Weight x 100
- Formula for % Weight Change:
- % UBW - 100
Example Calculation
- For an individual weighing 150 lbs with a usual body weight of 200 lbs:
- % UBW calculation:
- 150 lbs ÷ 200 lbs = 0.75
- 0.75 x 100 = 75%
- % Weight Change calculation:
- 75% - 100 = -25%
- % UBW calculation:
- A weight change of -25% indicates a significant reduction from the usual body weight.
- A weight change of 7.5% is generally considered significant over three months, making -25% a noteworthy decrease.
Significance of Weight Change
- A weight change exceeding 7.5% in three months is considered significant.
- An individual showing a 25% weight change reflects a substantial alteration in weight and may necessitate further assessment or intervention.
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