The subjective effects of smoking on nasal symptoms.

One hundred and forty-four volunteers completed a validated questionnaire, to investigate the association between smoking, non-smoking and passive smoking status, and the degree of a range of 10 common nasal symptoms. Logistic regression showed that smokers were four times and passive smokers six times more likely to report hyposmia compared to non-smokers. No significant differences were found between the three groups for any of the other nine symptoms.