TY - T1的短期改变自我COPD symptoms after smoking cessation in an internet sample JF - European Respiratory Journal JO - Eur Respir J SP - 1249 LP - 1255 DO - 10.1183/09031936.00090509 VL - 35 IS - 6 AU - Etter, J-F. Y1 - 2010/06/01 UR - //www.qdcxjkg.com/content/35/6/1249.abstract N2 - Smoking is the first risk factor for chronic obstructive pulmonary disease (COPD). Some recent reports suggest that, unexpectedly, some respiratory symptoms may increase transiently after smoking cessation, but there is a dearth of short-term data to test this hypothesis. The aim of the present study was to assess the validity of an online screening tool and to describe short-term associations between smoking behaviour and self-reported respiratory symptoms, in cross-sectional and longitudinal data. An internet survey was conducted in 2003–2009, on a smoking cessation website, with a follow-up survey after 30 days. There were 15,916 participants at baseline and 1,831 at follow-up. In the 252 baseline smokers who had quit smoking at 30-day follow-up, there was a substantial decrease in the proportion of participants who declared that they often coughed even without a cold (from 51.6% at baseline to 15.5% at follow-up), expectorated when they coughed in the morning (from 47.6% to 19.4%), were out of breath after climbing stairs or after a quick walk (from 75.0% to 48.4%), and who had a wheezing respiration (from 33.7% to 10.3%) (p<0.001 for all before/after comparisons). In participants who did not change their smoking behaviour between assessments, the test–retest reliability was r = 0.87 for a score summing these four symptoms. Smoking cessation was followed by a rapid and substantial improvement in self-reported respiratory symptoms. COPD is largely underdiagnosed and undertreated. Internet screening is reliable and may allow for the early detection of COPD symptoms at a large scale, in patients who may otherwise have no access to COPD case-finding efforts. ER -