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.
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Collins et al. (1999) studied this question.
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