Reliability of estimated waist
circumference measurement
The AB-140M uses the high correlation between waist
circumference at the navel as measured using a tape
measure (abdominal circumference) and the breadth of
the abdomen to calculate the waist circumference. The
regression equation is formulated based on data from
approximately 600 Japanese subjects of a variety of
physiques from infants to athletes, healthy adults and
people with spinal injuries, etc.
The estimated waist circumference measurement
achieves high levels of repeatability and excellent
reliability by utilising a positioning laser and multiple
non-contact sensors.
*The estimated waist circumference is a value for the waist
circumference at the navel (abdominal circumference). This
unit can be used to track changes in subjects for whom
measuring waist circumference has previously been difficult.
33
As Needed
Low
Trunk fat %
What is the trunk fat %?
True obesity is determined not by weight but by trunk fat %. Not only is body fat a source of energy for
activity, it also maintains body temperature, protects the body from external impact, provides moisture for
our skin, creates a smooth body line and ensures normal hormone activity, among other functions. An
excessively high percentage of body fat, however, causes hypertension, hyperlipidemia, diabetes and other
life-style related conditions.
There is said to be a particularly strong link between life-style related conditions and body fat in the trunk
(trunk fat % ratio). This unit analyses data based on dual energy x-ray absorptiometery (DXA) which
reveals the composition of individual body segments, and determines the trunk fat % using this analysis as
a benchmark. See below for trunk fat % ratio determinations.
*The ‘central body’ referred to here consists of the head, neck, chest, abdomen and lower back.
Trunk fat % determination
Standard Deviation
Bar
Number
Trunk fat % (%)
up to – -3SD 1<7.3
-3SD – -2SD 27.3 ≤ – <13.5
-2SD – -1SD 313.5 ≤ – <19.7
-1SD – -1/2SD 419.7 ≤ – <22.8
-1/2SD – +1/2SD 522.8 ≤ – <29.0
+1/2SD – +1SD 629.0 ≤ – <32.1
+1SD – +2SD 732.1 ≤ – <38.3
+2SD – +3SD 838.3 ≤ – <44.5
+3SD or more 944.5 ≤
Determination
Average
High
* Categories are determined according to average values of adult population samples and standard deviations.
Correlation between DXA trunk fat % and abdominal BIA trunk fat %
[Males][Females]
32
As Needed
Reading Results
Subject: 18 years and over (use as reference values for subjects under 18 years)
Estimated waist circumference
*This scatter graph is based on 120 healthy males and
females.
Visceral fat rating
Standards for visceral fat rating
Visceral fat rating are best used to track changes over the long term for effective health management.
Weight loss is required
through actively engaging in
exercise and food restrictions.
Please see a medical
practitioner for a medical
diagnosis.
Very High
5
3
High
No need for concern at present.
Continue with a balanced diet
and an appropriate amount of
exercise.
Average
1
18.0 – 20.013.0 – 15.01.0 – 6.0
2
6.5 – 12.5
4
15.5 – 17.5
6
20.5 and more
Determination
Interpretation
Visceral fat rating measured by this unit.
It is possible for subjects with low trunk fat % percentages to have high visceral fat rating.
Please see a medical practitioner for a medical diagnosis.
*Medical opinion states that when the actual value is more than 130cm
2
according to X-ray and CT imaging there is a high
probability of resultant life-style related disease. A level of 13.0 with this unit generally correlates to a Visceral fat area of
130cm
2
.
Visceral Fat
Bar number
Ensure that an appropriate
amount of exercise is done and
calorie intake is limited to
reduce weight to an
appropriate level.
Low
Standard Deviation
Bar
Number
Trunk fat % (%)
-2SD – -1SD 314.2 ≤ – <24.3
up to -2SD 2<14.2
-1SD – -1/2SD 424.3 ≤ – <29.4
-1/2SD – +1/2SD 529.4 ≤ – <39.5
+1/2SD – +1SD 639.5 ≤ – <44.5
+1SD – +2SD 744.5 ≤ – <54.6
+2SD – +3SD 854.6 ≤ – <64.7
+3SD or more 964.7 ≤
Determination
Average
High
