Table 3.

—Pearson Correlation Coefficients (r) Between Airway Counts of RB1, Dyspnea Score, Lung Function, 6MWD, and BODE Index in 50 Subjects

Airway Counts of RB1	mMRC Dyspnea Score	FEV1% Predicted	Dlco % Predicted	TLC, L	6MWD, m	BODE Index
Total airway count (generations 6-8)	−0.42	0.52	0.45	−0.01	0.36	−0.55
Sixth generation	−0.30	0.34	0.36	0.13	0.39	−0.45
Seventh generation	−0.41	0.45	0.43	−0.04	0.38	−0.53
Eighth generation	−0.40	0.53	0.43	−0.03	0.28	−0.50

P < .05 for all correlations, except for all TLC correlations, which were not significant. See Table 1 and 2 legends for expansion of abbreviations.