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* The age distribution and prevalence of lung disease and their risk factors are described in the context of COVID-19 incidence and symptom severity in a whole-nation cohort of Icelanders. The cohort is younger and had less severe symptoms than in many previosly published studies of COVID-19. Interestingly, the prevalences of smoking and e-cigarette use were lower than in the Icelandic general population and they were not associated with symptom severity at diagnosis. To conclude, the results presented here indicate that underlying lung diseases are prevalent among people with severe COVID-19 symptoms but fail to demonstrate an association between cigarette smoking or e-cigarette smoking with COVID-19 severity. | * The age distribution and prevalence of lung disease and their risk factors are described in the context of COVID-19 incidence and symptom severity in a whole-nation cohort of Icelanders. The cohort is younger and had less severe symptoms than in many previosly published studies of COVID-19. Interestingly, the prevalences of smoking and e-cigarette use were lower than in the Icelandic general population and they were not associated with symptom severity at diagnosis. To conclude, the results presented here indicate that underlying lung diseases are prevalent among people with severe COVID-19 symptoms but fail to demonstrate an association between cigarette smoking or e-cigarette smoking with COVID-19 severity. | ||
==[https://www.sciencedirect.com/science/article/abs/pii/S0091743520303406?dgcid=author Effects of E-Cigarette Use on Cigarette Smoking among U.S youth, 2014-18] see also accompanying Glantz [https://profglantz.com/2020/12/01/more-evidence-that-e-cigs-expanding-nicotine-addiction/ blog]== | ==[https://www.sciencedirect.com/science/article/abs/pii/S0091743520303406?dgcid=author Effects of E-Cigarette Use on Cigarette Smoking among U.S youth, 2014-18]== | ||
===see also accompanying Glantz [https://profglantz.com/2020/12/01/more-evidence-that-e-cigs-expanding-nicotine-addiction/ blog]=== | |||
*note another [https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2773464 paper] published 2/12 finds the exact opposite, due to differing frequency of use measures applied,ie one includes ever use as opposed to regular use. | *note another [https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2773464 paper] published 2/12 finds the exact opposite, due to differing frequency of use measures applied,ie one includes ever use as opposed to regular use. | ||
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