Table 3 Regression data for respiratory impedance in healthy young children.

Parameter	Equation	SEE	R2	p Value
Rrs6	27.860 − (0.180 * Ht)	1.918	0.311	<0.001
Rrs8	26.136 − (0.167 * Ht)	1.754	0.309	<0.001
Rrs10	23.647 − (0.147 * Ht)	1.567	0.304	<0.001
Rrs4–24	23.492 − (0.149 * Ht)	1.543	0.317	<0.001
Xrs6	−15.345 + (0.113 * Ht)	1.212	0.306	<0.001
Xrs8	−10.746 + (0.074 * Ht)	1.024	0.207	<0.001
Xrs10	−9.716 + (0.063 * Ht)	1.069	0.148	<0.001

Rrs₆, Rrs₈, Rrs₁₀, respiratory resistance at 6, 8 and 10 Hz; Xrs₆, Xrs₈, Xrs₁₀, respiratory reactance at 6, 8 and 10 Hz; Rrs_4–24, average Rrs between 4 and 24 Hz.

Respiratory impedance data are expressed in hPa.s/l and Ht in cm.

SEE is the standard error of the estimate.