S73 Cough frequency and diurnal patterns in children with asthma

摘要: Background Asthma is one of the commonest childhood diseases. Although cough considered a key symptom asthma, little known about patterns in asthmatic children. Previously, asthma have only been studied subjectively, terms frequency and diurnal variation, it has reported that asthmatics more at night, specifically from midnight until early morning. However, there objective data to confirm this. Using an monitoring system we investigated over 24 hours Methods Children (age 2–17 years) with diagnosis were asked wear VitaloJAK monitor for maximum on two occasions – when symptoms stable during exacerbation. All 24 hour recordings processed through compression software coughs counted by listening resulting files; number reported. Results 26 children (17 male; median age 11.9 completed stable; 12 repeated During period total counts awake-hours, sleep-hours periods 69.5 (range 3–395), 0 0–151) 71 4–432) respectively. Coughs occurred mostly awake time (86%), peaking 08:00 19:00 hours, rarely night subjects sleeping (14%). exacerbations 183 0–632), 18.5 0–128) 262 10–645), which significantly higher than (p Conclusions Objective shows greater day was reduced sleep both exacerbating asthma. Cough increases morning late afternoon.