# Using bmi formula referring to nhanes data between 5

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Using BMI formulaReferring to NHANES dataBetween 5th& 95th%tiles consideredNSelect data specific for sex, age, frame size, raceReferring to Wt HxIncl. UBWOther methods, less used nowMetropolitan Life Insurance TablesUSDA Healthy Weight Ranges & reference BW
Determination of IBWQuick wayto assess IBW rangeHt in cm-105 = IBW in kg(lower end)Ht in cm-100 = IBW in kg(highest end)MEMORIZE this!
Quick wayto assess IBW rangeHt in cm-105 = IBW in kg(lower end)Ht in cm-100 = IBW in kg(highest end)160 cm105=55 kg(lower end of IBW)160 cm - 100=60 kg(upper end of IBW)
Hamwi MethodGives rough estimate of IBWDoes not account for differences in age & raceIBW for men(kg)= 48.18 kg for 150 cm+1.1 kg per cm over 150 cmorl.1 kg per cm under 150 cmAdd 10% for large frameorSubtract 10% for small frameequation will be given on exam and noneed to memorize
Hamwi MethodGives rough estimate of IBWDoes not account for differences in age & raceIBW for women(kg)= 45.5 kg for 150 cm+0.9 kg per cm over 150 cmor0.9 kg per cm under 150 cmAdd 10% for large frameorSubtract 10% for small framethis is a formula, we will give thison exam
IBW usingHamwi MethodIBW for women(kg)= 45.5 kg for 150 cm+0.9 kg per cm over 150 cmor0.9 kg per cm under 150 cm160 cm female45.5 + (10 x .9) =54.5 kg IBW
Calc. IBW Using BMI FormulaBody Mass IndexDesirableBMI= IBW (kg)to determineHeight2(m2)knownDesirableBMI(kg/m2)x Height2(m2)=IBW(kg)BMI 18.5 + 24.9= 43.4/2Goal BMI21.7Ht 1.6 m21.7 x (1.62)=55.6 kgthis is not a formulamost common method18.5 if small frame24.9 if large framehealthy RangeAverage or midpoint for a healthy BMI
Body CompositionUnderwater weighing is the GOLD standard
Body CompositionEvaluation of body content(muscle, fat,water, bone, etc.)usingCircumferences & areasSkinfold thicknessBioelectrical Impedence Analysis (BIA)Dual Energy X-ray Absorptiometry (DEXA)Air displacement plethysmography (Bod Pod)Etc.musclefatbone - most densewaterUltrasound
Circumferences & AreasMid-upper-ArmMuscleCircumference (MAMC)Calculated from measuredMid-upper-ArmCircumference (MAC)Tricep skinfold thicknessMAMC = MAC(mm)(πx TSF(mm))Reflects skeletal muscle & bone in armCorrects for subcutaneous fatQuick & easy estimate of muscle mass,but insensitive to small changesOther limitation: Assumes cylindrical armknow components ofequationinsensitive so not good forchildren better to check wt whichis sensitive
Circumferences & AreasMid-upper-ArmMuscleArea (MAMA)Calculated from measuredMid-upper-Arm Circumference (MAC)Tricep skinfold thicknessMAMA= [MAC(mm)(πx TSF(mm))]24πReflects skeletal muscle & bone in armCorrects for subcutaneous fatMore accurate & sensitive estimateof skeletal muscle mass than MAMC
Circumferences & AreasMid-upper-ArmFatArea (MAFA)Calculated from measuredMid-upper-ArmCircumference (MAC)

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Term
Summer
Professor
NoProfessor
Tags
Body mass index, body fat percentage, Adipose tissue, IBW