Comparison of √Aaw at Pi10 among the five lung lobes in 157 male smokers.

<p>√Aaw at Pi10, square root of airway wall area of the hypothetical airway with an internal perimeter of 10 mm; horizontal line inside the box, median; horizontal line crossing the box, mean; lower and upper margins of the box, 25^th and 75^th percentiles; whiskers, lines extend from the margins of the box to the lower and upper data point values. √Aaw at Pi10 differs significantly among the five lung lobes (R² = 0.78, P<0.0001 by a mixed-effects model). <b>√</b>Aaw at Pi10 of the right upper lobe is significantly thinner than that of the four other lobes; <b>√</b>Aaw at Pi10 of the left lower lobe is significantly thicker than that of the other lobes; there are no significant differences in <b>√</b>Aaw at Pi10 between each pair of lobes among the right middle, right lower, and left upper lobes.