Table 6 Summary of the predictive equation of impulse oscillometry in different ethnicities
From: Reference equations for parameters of impulse oscillometry in Egyptian children and adolescents
Author, year | Ethnicity | Predictive equation | R2 | Predictive variables |
|---|---|---|---|---|
de Assumpção et al. 2016 | Brazilian | Boys |  | Height and age |
|  |  | R5 Hz = 1.699 − (0.008 × height) | 62 |  |
R20 Hz = 1.226 − (0.005 × height) | 49 | |||
X5 Hz = − 0.552 + (0.003 × height) | 15.9 | |||
Z5 Hz = 1.802 − (0.010 × height) | 51 | |||
Fres Hz = 44.473 − (0.195 × height) | 50.5 | |||
Log AX = 0.332 − (0.002 × height) | 58 | |||
Girls | Â | |||
Log R5 Hz = 0.639 − (0.006 × height) | 57.5 | |||
Log R20 Hz = 0.378 − (0.005 × height) | 59.1 | |||
X5 Hz = − 0.586 + (0.003 × height) | 55.1 | |||
Log Z5 Hz = 0.679 − (0.007 × height) | 59.9 | |||
Log Fres = 1.555 − (0.037 × age) | 41.1 | |||
Log AX = 0.892 − (0.106 × age) | 49.7 | |||
Park et al. 2011 | Korean | Boys | Â | Boys |
R5 Hz = 1.934 − 0.009 × Height | 12.1 | Height and age | ||
X5 Hz = 0.774 + 0.006 × Height − 0.002 × Age | 20.2 |  | ||
Girls | Â | Girls | ||
R5 Hz = 2.201 − 0.012 × Height | 18.2 | Height only | ||
X5 Hz = − 0.674 + 0.004 × Height | 10.5 |  | ||
Denker et al. 2006 | Finland and Sweden | Z5 Hz = 0.282 + 0.801 × height−3 + 0.004 × weight |  | height−3 and weight |
R5 Hz = 0·266 + 0·759 × height−3 + 0·004 × weight |  | |||
R20 Hz = 0·259 + 0·630 height−3 |  | |||
X5 Hz = − 0·123–0·225 height−3 |  | |||
Fres = 11·749 + 4·373× height−3 + 0·103 × weight |  | |||
Gochicoa-Rangel et al. 2015 | Mexican | Z5 Hz = − 0.595 × log age + 130.320 × |  | Height and age |
1/height + 0.214 | Â | |||
R5 Hz = − 0.736 × log age + 78.861 × 1/height + 0.702 |  | |||
R20 Hz = − 0.427 × log age + 69.880 × 1/height + 0.307 |  | |||
X5 Hz = 0.309 × log age − 42.906 × 1/height − 0.185 |  | |||
Fres = − 0.308 × log age + 2542.196 × |  | |||
1/height + 0.791 | Â | |||
AX = − 2.345 × log age + 640.548 × 1/height − 1.212 |  | |||
Amra et al. 2007 | Iranian | Boys | Â | Height and age |
R5 Hz = − 6.19 × 10(− 7) × age × 3.820 − |  | |||
6.78E−005 × height × 1.651 + 0.691 |  | |||
X5 Hz = 6.95 × 10(− 23) × age × 16.226 + |  | |||
0.004 height × 0.846 − 0.430 |  | |||
Girls | Â | |||
R5 Hz = − 1.35 × 10(− 5) × age × 2.823 − |  | |||
0.001 × height × 1.022 + 0.547 |  | |||
X5 Hz = 1.78 × 10− 7) × age × 1.08 + 0.002 |  | |||
height × 4.150 − 0.539 |  | |||
Meraz et al. 2007 | Anglo and Hispanic | R5 Hz = 1.428 − 0.006 × height | 0.647 | Height |
R20 Hz = 1.072 − 0.005 × height | 0.473 | |||
X5 Hz = − 0.340 + 0.001 × height | 0.151 | |||
Fres = 27.589 − 0.008 × height | 0.165 | |||
AX = 1.213 − 0.005 × height | 0.241 | |||
Lai et al. 2015 | Taiwanese | R5 Hz = 2.4395 − 0.0134 × height |  | Height |
R20 Hz =1.3888 − 0.0069 × height |  | |||
X5 Hz = − 0.6408+0.0036 × height |  | |||
AX = 10.4286 − 0.0686 × height |  | |||
Frei et al. 2005 | North American | R5 Hz = 2.11679 − 0.0099 × height | 0.435 | Height |
R20 Hz = 1.45644 − 0.0065 × height | 0.321 | |||
X5Hz = − 1.1974+0.00673×height | 0.219 | |||
AX = 10.9448 − 0.684 × height | 0.351 |