Table 1

 Characteristics of patients at study entry

Asthma(n = 26)Chronic purulent bronchitis(n = 12)Healthy controls(n = 42)
*Non-typeable Haemophilus influenzae (n = 7), Staphylococcus aureus (n = 3), Pseudomonas aeruginosa (n = 2).
Mean (range) age (years)10.8 (7–15)11.8 (7–15)12.3 (6–15)
Male sex, n (%)12 (46.1%)6 (50%)24 (57.1%)
Atopy, n (%)18 (69.2%)0Not assessed
Mean (SD) FEV1 (% predicted)94.0 (13.9%)86.4 (26.7%)109 (10.2%)
Bacterial colonisation of sputumNot assessed12 (100%)*Not assessed
Regular systemic or inhaled antibiotics,n (%)012 (100%)0
Inhaled steroids, n (%)15 (57.8%)3 (25%)0