product-image

Spirometry, Yes please!

Spirometry is a simple test which is used to measure the air that each individual can breathe. It is the […]

product-image

HomeCare, Yes please!

COVID-19 has caused a massive acceleration in the use of Telehealth and Remote Patient Monitoring. The time to act is […]

product-image

Oximetry, Yes Please!

Oximetry is yet another vital sign, expressed by a single number known as SpO2. This is the percentage measurement of […]

Clinical Insights

Interpreting results with GLI-2012 using Z-score and LLN

Let’s try to calculate %Predicted and Z-Score

The heights of the dogs (in mm) are: 600, 470, 170, 430 and 300

CLASSIC METHOD: %PREDICTED = MEASURED / PREDICTED x 100
Rottweiler 600/394 x 100 = 152% taller then PREDICTED
Dachshund 170/394 x 100 = 43% shorter then PREDICTED
Schnauzer 430/394 x 100 = 109% very close to PREDICTED
It is a very intuitive method and indicates what is the percentage value of the MEASURED VALUE in relation to the PREDICTED VALUE

 

NEW METHOD: Z–SCORE = (MEASURED – PREDICTED) / STANDARD DEVIATION
Rottweiler (600-394)/147 = +1.40= more then 1 SD taller
Dachshund (170-394)/147 = -1.52= more then 1 SD shorter
Schnauzer (430-394)/147 = +0.24= less then 1 SD taller
This method is less intuitive and indicates how often a measurement is greater (+) or less (-) of the STANDARD DEVIATION.

Pages: 1 2 3 4 5 6 7

From same category

product-image

GLI-2012 predicted values for spirometry 3-95 year age range

product-image

Predictive Power of Spirometry