TABLE 4

Prediction equations and residual standard deviation for respiratory resistance and reactance parameters in male and female subjects

	Male				Female
	a	b	c	RSD	a	b	c	RSD
Resistance
R₅	2.07069	−1.05124	0.03337	0.24603	2.22395	−0.98351	0.02903	0.24652
R₁₀	2.00342	−1.02184	0.03219	0.24212	2.15420	−0.95864	0.02737	0.24568
R₁₅	1.92723	−0.91154	0.02674	0.23324	2.05048	−0.85489	0.02451	0.23813
R₂₀	1.95570	−0.81148	0.02042	0.22300	2.01077	−0.72768	0.02009	0.22939
R_5–15	0.51755	−0.51198	0.02192	0.19274	0.59340	−0.53125	0.02103	0.19460
R_5–20	0.37755	−0.70125	0.03588	0.28254	0.59582	−0.91438	0.03737	0.36151
Reactance
X₅	0.10509	0.82626	−0.01775	0.241371	0.29066	0.73387	−0.01984	0.17914
X₁₀	1.14127	0.29830	−0.01128	0.121614	1.07282	0.34050	−0.01080	0.09940
AX	4.36142	−3.47450	0.08784	0.687626	4.67153	−3.31633	0.06719	0.69309
f_res	2.72388	−0.69422	0.03115	0.251555	3.30330	−0.95364	0.02520	0.26591

Ln(oscillometry parameter)=a+b × height+c × body mass index. For R_5–15 and R_5–20 the equation yields the predicted value+1; for X₅ and X₁₀ the equation yields the predicted value+4. Units: height (m); body mass index (kg·m⁻²). RSD: residual standard deviation; R₅: resistance at an oscillating frequency of 5 Hz; R₁₀: resistance at an oscillating frequency of 10 Hz; R₁₅: resistance at an oscillating frequency of 15 Hz; R₂₀: resistance at an oscillating frequency of 20 Hz; R_5–15: difference between resistance at 5 and 15 Hz; R_5–20: difference between resistance at 5 and 20 Hz; X₅: reactance at an oscillating frequency of 5 Hz; X₁₀: reactance at an oscillating frequency of 10 Hz; AX: area under the reactance curve from 5 Hz to the resonant frequency; f_res: resonant frequency.