Normal and Therapeutic Nutrition

Normal and Therapeutic Nutrition 3(2+1)

Lesson 31:Over weight and Obesity – causes, symptoms and dietary management

Assessment

1. Body weight: >10% of normal body weight is classified as over weight
   >20% of normal body weight is classified as obesity



% Body weight >normal	Degree of obesity
25	Mild
50	Moderate
75	Severe
100	Very severe/ morbidity



2. Body mass index (Quetlet index) weight (kg)/height 2(m)



<18.5	Under weight
18.5-24.9	Normal
25-29.9	Grade I obesity
30-40	Grade II obesity
>40	Grade III obesity




Body Mass Index: Weight (in kilograms) divided by height squared (in meters); a value of 30 or more indicates obesity.



3. Waist circumference
• Men: >40 inches (>102cm)
• Women: >35 inches (88cm)
4. Measurement of body fat
• Harpender calipers: fat at triceps (85-90mm)
• Lange calipers: abdomen and sub scapular regions
• USA MRNL calipers: sub coastal sites
5. Waist to hip ratio: Normal 0.7
6. Broka’s Index= Height in cm-100 = ideal weight (kg)