Table 2.

Correlation between Sputum Mucus Properties and Lung Function and Bronchiectasis Extent Score in Patients with Non–Cystic Fibrosis Bronchiectasis

	FEV1 (% Predicted)	Bronchiectasis Extent Score
Solids, %	−0.22 (−0.43 to −0.01)*	0.41 (0.19 to 0.63)†
Total mucins, μg/ml	−0.08 (−0.29 to 0.13)	0.10 (−0.14 to 0.33)
MUC5AC/MUC5B	−0.43 (−0.74 to −0.12)*	0.22 (−0.20 to 0.63)
Sputum volume, g	−0.20 (−0.40 to 0.002)	0.35 (0.13 to 0.57)‡
Osmotic pressure, Pa	−0.01 (−0.22 to 0.21)	0.25 (0.002 to 0.50)*
Complex viscosity, Pa ⋅ s	0.08 (−0.16 to 0.31)	0.26 (0.02 to 0.51)*

Definitions of abbreviations: MUC5AC = mucin 5AC; MUC5B = mucin 5B.

Data are presented as Spearman rho correlation coefficients (95% confidence interval) (n = 99).

^*P < 0.05.

^†P < 0.001.

^‡P < 0.01.