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Calculating Percent Body Weight and Change
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Calculating Percent Body Weight and Change

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Questions and Answers

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%?

    -25

    Is a weight change of -25 significant over three months?

  • No
  • Yes (correct)
  • 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%
    • 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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    Description

    This quiz focuses on the calculations of Percent of Usual Body Weight (% UBW) and Percent Weight Change. It includes definitions and examples to help understand these important concepts in body weight assessment for both men and women.

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