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Clinical Insights

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

How to use the Standard Deviation

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

MEAN = 394 mm (green line)
STANDARD DEVIATION = 147 mm (blue line)
LLN = MEAN – 1.64 x STANDARD DEVIATION = 394 – 1.64 x 147 = 153

NOTE: the STANDARD DEVIATION is calculated by taking in account the differences between
the MEASURED VALUE and the MEAN VALUE for all dogs.

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


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