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CUBAClinical
Data
output and interpretation
The CUBAClinical measures BUA (Broadband Ultrasound Attenuation).
BUA = The Attenuation
of the ultrasound signal as it passes through the heel bone.
The more complex the
structure of the bone, the more the sound wave will be blocked. Therefore
normal bone has a higher attenuation (BUA) than osteoporotic bone.
BUA is compared to
results obtained from a normative population and expressed graphically
and in the following terms by % expected for the subject’s age group,
Z score and T score.
Interpretation
of the printout.
The ultrasound bone
sonometry reading is expressed in 4 ways.
BUA
The actual ultrasound reading in decibels /megahertz
% EXP
As a percentage value expected for a person of your age
Zu
As a standard deviation that is again age matched
Tu
As a standard deviation that is matched to young peak bone mass. This
measurement indicates the amount by which your bones have deteriorated
compared to a normal 20 year old person.
The fracture
status is determined by the "Tu" score, which is shown
by horizontal colored bands on the result sheet. There are three bands
green, yellow and red.
Band |
T
Score |
Fracture
Risk |
Green |
>-1Sd |
Low
Risk |
Yellow |
Between
-1Sd and -2Sd |
Medium
Risk |
Red |
<-2Sd |
High
Risk |
Note: T score = number of standard deviations
that the subjects reading is away from young normal.
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