Figure 2From: Macrorheology of cystic fibrosis, chronic obstructive pulmonary disease & normal sputum Box and whisker plot comparing rheology of sputum (irrespective of macroscopic appearance) from normal, COPD and CF subjects, for dynamic viscosity. (As indicated, significant differences were observed between all groups for dynamic viscosity η' at 0.3 Hz. Normal n = 7, COPD n = 12, CF n = 18. * by Mann-Whitney U Test).Back to article page