Dietary Computations

Jemma G. de LeonUERMMMCI – College of Nursing

Nutrition Evaluation

Weight A sensitive marker of current nutritional

status Provides a basic evaluation of overall fat

and, muscle stores

Nutrition Evaluation

Actual Weight Measurement obtained at the time of

examination

How to obtained correct weight measurement? Use a beam balance or bathroom scale

How to obtained correct weight measurement? Weight shall be taken before breakfast,

with minimum clothing and after urinating Allow the subject to stand still in the

middle of the scale without touching anything

Weight is read to the nearest 10 grams fro infants and 100 grams for children and older

Classification of Weight Status

Percentage Standard Weight Comparing expected weight and actual

body weight

% standard weight = ABW x 100 DBW

Classification of Weight Status in children

Percentage Category

90 - 110 Normal

75 - 89 1st degree, mild underweight

60 - 74 2nd degree, moderately underweight

< 60 3rd degree, severely underweight

Classification of Weight Status in Adults

% standard weight Category> 200 Obese, morbid

141 - 200 Obese, moderate>120 - 140 Obese, mild>110 - 120 Overweight

90 - 110 Normal85 - 89 Underweight, mild75 - 84 Underweight, moderate

< 75 Underweight, severe

Classification of Weight Status

Body Mass Index (BMI) Quetelet index Used to estimate degree of obesity of an

individual To estimate the amount of total body fat Used to determine if an individual is at risk

to develop certain health problems

Classification of Weight Status

Body Mass Index (BMI)

BMI = Weight (kilos) Height (meter)2

BMI Classification for Adults (WHO)

BMI Values Category< 16 Severe underweight

16 – 16.9 Moderate underweight17 – 18.4 Mild underweight

18.5 – 24.9 Normal25 – 29.9 Preobese / Overweight30 – 34.9 Obese, Grade 135 – 39.9 Obese, Grade 2

> 40 Obese, Grade 3

BMI Values for Adults (Asia Pacific Guidelines)

BMI Values Category< 18.5 Underweight

18.5 – 22.9 Normal range

> 23 Overweight

23.1 – 24.9 At risk

25 – 29.9 Obese 1

> 30 Obese 2

Evaluation of Weight Changes

It reflects the severity and extent of an individuals illness

Evaluation of Weight Changes

Amount remaining of the usual weight

% weight change = Present weight x 100Usual weight

Evaluation of Weight Changes

Amount of weight loss

% weight loss = (usual weight - present weight) x 100 Usual weight