CHAPTER 07 | Obtain Routine Nutrition Screening Data Table 7.1 Hamwi Formula to Calculate Ideal Body Weight (IBW) WOMEN
IBW = 100 lbs. for first 5 feet in height + 5 lbs. for each inch over 5 feet.
Frame Adjustments (Men and Women)
For a small frame, subtract 10% of the total. Medium frame = no change For a large frame, add 10% to the total
For heights less than 60”, subtract 5 lbs. for each inch below 60” (Walter & Patel, 2020). Example:
Kamal is a 5’10” male with a large frame: 106 lbs. + (10 inches over 5’ x 6 lbs. per inch) = 106 + 60 = 166 lbs. For large frame, add 10% 166 x 1.10 = 183 lbs. (rounded)
Table 7.2 Calculating IBW with Amputations
Example: Kamal’s actual weight is 165 lbs. Kamal has a below-knee amputation on both sides of his body (bilateral).
Amputation Level Foot Below-knee Above-knee Above-elbow Below-elbow Hand
Estimated % of Total Body Mass 1.5% 3.5% 11%
3.55% 1.45% .7%
Calculation for adjusting IBW: IBW – (IBW x % of total body mass removed = Adjusted IBW For Kamal: (3.5 / 100) x 2 = 0.07 for 2 below-knee amputations 165 x 0.07 = 12 lbs. for missing limbs on both sides 165 - 12 lbs. = 153 lbs. is Kamal’s IBW adjusted for missing limbs
Source: Amputee Coalition, n.d. Putting it
into Practice Refer to the Supplemental Materials for answer.
MEN
IBW = 106 lbs. for first 5 feet in height + 6 lbs. for each inch over 5 feet.
1.
If a female client is 5’3” and usually weighs 145 lbs., but now weighs 125 lbs., what percentage is this client of their usual weight? What is their current BMI? What is their IBW?
Nutrition Fundamentals and Medical Nutrition Therapy