Bronchodilator responsiveness is lower with afternoon and wintertime spirometry: study
Adelaide GP Dr Kerry Hancock said the finding probably reflected that patient lung function was generally worse in winter or in the morning.
Bronchodilator responsiveness falls by 8% for each hour of the day that has elapsed, showing the importance of spirometry timing, UK researchers say.
The retrospective study by Cambridge University Hospitals NHS doctors also found that bronchodilator responsiveness was lower in summer or spring than winter, based on 1620 patients (62% female) with diagnosed or suspected asthma.
