Calculating Percent Body Weight and Change

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.

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.