Comparison of maximum tracheal cross-sectional area reduction percentage
between endexpiration and end-inspiration (A% - left) and minimum ratio of
tracheal minor-to-major diameter at endexpiration (rD,exp - right) to positive
or negative diagnosis of tracheomalacia (TM) via clinical bronchoscopy. Both
measures were found to correlate with clinical diagnosis of TM (P < 0.001
and P = 0.008 for A% and rD,exp, respectively). Plot elements are represented as
follows: median (black line), interquartile range (grey box), data within 1.5
times the interquartile range below 25% and 75% (black whiskers), and data
outside this range (black cross).