{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,21]],"date-time":"2025-10-21T15:03:14Z","timestamp":1761058994160,"version":"3.37.3"},"reference-count":31,"publisher":"European Respiratory Society (ERS)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur Respir J"],"accepted":{"date-parts":[[2009,10,13]]},"published-print":{"date-parts":[[2010,6]]},"abstract":"<jats:p>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.<\/jats:p><jats:p>An internet survey was conducted in 2003\u20132009, on a smoking cessation website, with a follow-up survey after 30\u2005days.<\/jats:p><jats:p>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&lt;0.001 for all before\/after comparisons). In participants who did not change their smoking behaviour between assessments, the test\u2013retest reliability was r\u200a=\u200a0.87 for a score summing these four symptoms.<\/jats:p><jats:p>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.<\/jats:p>","DOI":"10.1183\/09031936.00090509","type":"journal-article","created":{"date-parts":[[2009,11,20]],"date-time":"2009-11-20T02:58:05Z","timestamp":1258685885000},"page":"1249-1255","source":"Crossref","is-referenced-by-count":15,"title":["Short-term change in self-reported COPD symptoms after smoking cessation in an internet sample"],"prefix":"10.1183","volume":"35","author":[{"given":"J-F.","family":"Etter","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"81","published-online":{"date-parts":[[2009,11,19]]},"reference":[{"key":"2024102020073656000_35.6.1249.1","doi-asserted-by":"publisher","DOI":"10.1136\/thx.2006.064410"},{"key":"2024102020073656000_35.6.1249.2","unstructured":"Peto R, Lopez AD, Boreham J, et al. 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