10
Evaluation of results
Body mass index (BMI)
The body mass index (BMI) is a number that is often called upon to evaluate body weight. The
number is calculated from body weight and height, the formula is – body mass index = body
weight : height². The measurement unit for BMI is [kg/m²]. According to the BMI, weight is clas-
sifi ed for adults (20 years and over) using the following values (source: WHO):
Category
Underweight
Normal weight
Overweight
Obese (overweight)
11 Results in relation to time
Remember that only long-term trends are important. Short-term fl uctuations in weight
over a few days are usually the result of a loss of fl uid.
16
User
User M
User
M
User
M
Severely underweight
Moderately underweight
Slightly underweight
Pre-obese
Class I obese
Class II obese
Class III obese
User
kg
Ā
User
kg
User
kg
User
kg
BMI
< 16
16-16,9
17-18,4
18,5-25
25,1-29,9
30-34,9
35-39,9
≥ 40
kg
M
BMI
M
BMI
M
BMI