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The Influence of Active and Passive Smoking on Habitual Snoring

Department of Respiratory Medicine, University Hospital, Ume; Department of Respiratory Medicine and Allergology, Uppsala University, Uppsala; and Department of Occupational and Environmental Medicine and Allergology, Sahlgrenska University Hospital, Göteborg, Sweden; Department of Pulmonary Medicine, Landspitali University Hospital, Reykjavik, Iceland; Department of Thoracic Medicine and Center for Clinical Research, Haukeland University Hospital, Bergen, Norway; Lung Clinic, Foundation Tartu University Clinics, Tartu, Estonia; Department of Respiratory Diseases, University Hospital, Aarhus, Denmark

Correspondence and requests for reprints should be addressed to Karl A. Franklin, M.D., Ph.D., Department of Respiratory Medicine, University Hospital, SE-901 85 Umeå, Sweden. E-mail: karl.franklin{at}lung.umu.se

The impact of active smoking, passive smoking, and obesity on habitual snoring in the population is mainly unknown. We aimed to study the relationship of habitual snoring with active and passive tobacco smoking in a population-based sample. A total of 15,555 of 21,802 (71%) randomly selected men and women aged 25–54 years from Iceland, Estonia, Denmark, Norway, and Sweden answered a postal questionnaire. Habitual snoring, defined as loud and disturbing snoring at least 3 nights a week, was more prevalent among current smokers (24.0%, p < 0.0001) and ex-smokers (20.3%, p < 0.0001) than in never-smokers (13.7%). Snoring was also more prevalent in never-smokers exposed to passive smoking at home on a daily basis than in never-smokers without this exposure (19.8% vs. 13.3%, p < 0.0001). The frequency of habitual snoring increased with the amount of tobacco smoked. Active smoking and passive smoking were related to snoring, independent of obesity, sex, center, and age. Ever smoking accounted for 17.1% of the attributable risk of habitual snoring, obesity (body mass index 30 kg/m²) for 4.3%, and passive smoking for 2.2%. Smoking, both current and ex-smoking, is a major contributor to habitual snoring in the general population. Passive smoking is a previously unrecognized risk factor for snoring among adults.

Key Words: epidemiology • obesity • smoking • snoring • tobacco

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