Skip to main content

Table 2 Baseline sputum properties and subjective reports

From: Effects of treadmill exercise versus Flutter® on respiratory flow and sputum properties in adults with cystic fibrosis: a randomised, controlled, cross-over trial

  Mean ± SD Range
Sputum solids content (%) 6.4 ± 2.6 1.6–13.3
Sputum mechanical impedance (G*) at 1 rad/s (Pa) 21.0 ± 15.9 5.7–59.1
Sputum mechanical impedance (G*) at 100 rad/s (Pa) 174.8 ± 76.7 84.1–396.7
Sense of chest congestion (cm) 5.5 ± 2.4 0.5–9.8
Ease of expectoration (cm) 4.9 ± 2.5 0.1–10.0
  1. Mean ± standard deviation and range of sputum properties and subjective reports for the first sputum sample collected from the 24 participants who completed the study. Sputum mechanical impedance (G*, the vector sum of sputum viscosity and elasticity). Subjective sense of chest congestion (0 = very congested, 10 = very clear) and ease of expectoration (0 = very difficult to expectorate, 10 = very easy to expectorate) scored by participant on a 10 cm visual analogue scale