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IQmark Digital Spirometer Operation Manual
86
Zapletal – Pediatric
Age range is from 6 to 18 years.
H = Height in centimeters.
Parameter Sex Race Predicted Equation SEE CI
95%
FVC M W 7.9942 – 0.12509 x H + 0.000605 x H
2
F W 0.1694 – 0.01217 x H + 0.000605 x H
2
FEV
1.0
M W 6.6314 – 0.10261 x H + 0.000499 x H
2
F W -3.0378 + 0.03640 x H
FEF
25%
M W -2.3069 + 0.02817 x H
F W -1.8576 + 0.02483 x H
FEF
50%
M W -4.5848 + 0.05430 x H
F W -3.3655 + 0.04477 x H
FEF
75%
M W -6.822 + 0.07811 x H
F W -5.1934 + 0.06367 x H
PEF M W -6.9865 + 0.08060 x H
F W -5.3794 + 0.06594 x H
Eigen – Pediatric
The age range is from 3-6 years and the height range is 87-127 cm (34.3 to 50 inches).
Parameter Intercept (α) Slope (β) SEE CI
95%
FVC -13.63 2.95 0.1167 0.192
FEV
1
-12.26 2.63 0.1124 0.185
FEF
25-75
-8.13 1.81 0.2393 0.394
FEV
1
/FVC
(see Note 1)
1.37 -0.31 0.0608 10.0
(see Note 2)
PEF -10.99 2.54 0.1509 0.248
Notes: 1. The FEV
1
/FVC predicted equation generates a fraction instead of a
percentage so the software must convert this number to a percentage.
2. The FEV
1
/FVC predicted equation generates a fraction instead of a
percentage so the CI
95%
value has been converted to a percentage value
Patient gender was not considered in the regression analysis. The Knudson Pediatric
predicted equations will not be used for missing parameters because that study does not
cover children less than 6 years old. In addition, the Eigen equations should not be used as
the default pediatric equations because of the limited age range.
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