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. 2019 Jul 17;12:195–203. doi: 10.2147/JAA.S193744

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© 2019 Díaz Palacios et al.

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Correlation between parameters of spirometry and IOS. Only frequencies higher than 0.7 (red lines) or less than −0.7 (blue lines) are shown. The thickness of the lines is proportional to the frequency.

Note: (%) after every abbreviation means relative or percentual values.

Abbreviations: Z₅, impedance; R₅, reactance at 5 Hz; R₁₀, reactance at 10 Hz; R₂₀, reactance at 20 Hz; R₅-R₂₀, difference between R₅ and R₂₀; Fres, resonance frequency; Rc, central resistance; Rp, peripheral resistance; XA, reactance area; FEF _25-75, forced expiratory flow at 25-75% (absolute values).