Top Panel: R₅₋₂₀ at baseline and during voluntary inflation.

<p>Data are mean ± SE. Dotted line represents the upper limit of normal. Bottom Panel: Individual values obtained during voluntary inflation are plotted as a function of the absolute EELV at which it was obtained. EELV is expressed as % predicted FRC. Data are shown for 50/71 patients in whom maneuvers were acceptable for analysis. Dotted line represents the upper limit of normal. (• = baseline ○ = voluntary inflation).</p

Clinical Characteristics (n = 100).

<p>*Mean ± SD.</p>†<p>Multiple symptoms may be present.</p

Top Panel: R₂₀ at baseline and during voluntary inflation.

<p>Data are mean ± SE. Dotted line represents the upper limit of normal. Bottom Panel: Individual values for specific conductance at 20 Hz (SG_rs @ 20 Hz) plotted as a function of the absolute EELV at which it was obtained. EELV is expressed as % predicted FRC. Dotted and solid lines represent the mean ±1.65 SD calculated from data obtained in normal subjects. (• = baseline ○ = voluntary inflation).</p

Effect of bronchodilator administration on R₅₋₂₀ at baseline and during voluntary inflation to predicted FRC.

<p>Data are mean ± SE. Dotted line represents the upper limit of normal. (• = baseline ○ = voluntary inflation).</p

Individual values for R₂₀, R₅₋₂₀, and X₅ are related to ERV.

<p>Dotted line represents the upper limit of normal for each parameter.</p