Service manual

IQmark Digital Spirometer Operation Manual
85
Use the following equation to calculate the predicted value for a lung function parameter
(LFP).
2
3
2
210
*** HeightbAgebAgebbLFP 
Height is in centimeters and age is in years. Use b
3
coefficient from the Ht
prd
column for the
predicted value calculation. Use the b
3
coefficient from the Ht
lln
column to calculate the lower
limit of normal.
The following table presents the predicted values for FEV
1.0
/FEV
6.0
% and FEV
1.0
/FVC %
Parameter Sex Race Intercept
prd
Age Intercept
lln
B
0
b
1
b
0
FEV
1.0
/
FEV
6.0
%
M W 87.340 -0.1382 78.372
M B 88.841 -0.1305 78.979
M H 89.388 -0.1534 80.810
F W 90.107 -0.1563 81.307
F B 91.229 -0.1558 81.396
F H 91.664 -0.1670 83.034
FEV
1.0
/
FVC %
M W 88.066 -0.2066 78.388
M B 89.239 -0.1828 78.822
M H 90.024 -0.2186 80.925
F W 90.809 -0.2125 81.015
F B 91.655 -0.2039 80.978
F H 92.360 -0.2248 83.044
Use the following equation to calculate the lung function parameter (LFP).
AgebbLFP *
10

Use the b
1
coefficient from the Intercept
prd
column to calculate the predicted value. Use the b
1
coefficient from the Intercept
lln
column to calculate the lower limit of normal.
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