Comparison of age and lung function tests results in the cystic fibrosis (CF) patients with or without chronic bacterial colonisation
| Colonised | Yes-no | ||
| Yes | No | ||
| Patients n | 14 | 29 | |
| Age yrs | 13.7 (2.8) | 9.3 (3.9) | 2.0–6.7*** |
| FEV1 % pred | 74.7 (22.8) | 96.1 (13.9) | −32.3–−10.1*** |
| MEF50 % pred# | 67.1 (36.0) | 110.0 (36.0) | −68.3–−17.6** |
| MEF25 % pred# | 43.7 (30.9) | 79.1 (27.5) | −55.9–−14.9** |
| RV/TLC %¶ | 33.0 (14.4) | 22.7 (5.4) | 3.4–17.1** |
| MR | 1.91 (0.69) | 1.47 (0.28) | 0.14–0.74** |
| LCI | 9.85 (3.49) | 7.60 (1.37) | 0.76–3.74** |
Data are presented as mean (sd) and 95% confidence interval for thedifference between the groups unless otherwise stated
FEV1: forced expiratory volume in one second
% pred: % predicted
MEF50: maximum expiratory flow at 50% of forced vital capacity
MEF25: maximum expiratory flow at 25% of forced vital capacity
RV: residual volume
TLC: total lung capacity
MR: mixing ratio
LCI: lung clearance index
#: MEF50 and MEF25 results were available for analyses in 20 noncolonised patients
¶: RV/TLC results were available for analyses in 22 noncolonised patients and 13 colonised
**: p<0.01
***: p<0.001