ORIGINAL ARTICLES: MECHANISMS OF ALLERGIC AND IMMUNE DISEASES
Association between alcohol consumption and skin prick test reactivity to aeroallergens

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Background

A few studies have indicated a positive association between consumption of alcohol and allergic sensitization in age and socioeconomically heterogeneous populations.

Objective

To investigate the association between consumption of alcohol and allergic sensitization in a young homogenous population of high social class (a group with a suspected high prevalence of sensitization).

Methods

A total of 1,668 students aged 18 to 35 years recruited from universities in Copenhagen, Denmark, underwent skin prick testing (SPT) in October or November 2002 and completed a questionnaire about respiratory disease and lifestyle habits, including alcohol consumption. SPT positivity was defined as a positive reaction (≥3 mm) against at least 1 of 10 common inhalant allergens.

Results

Before and after adjustment for sex, age, smoking, atopic predisposition, and pet keeping, no significant association was found between alcohol consumption (including type of beverage) and SPT positivity. Increasing alcohol consumption was significantly negatively associated with asthma symptoms and hay fever symptoms.

Conclusions

Alcohol consumption does not favor SPT positivity, but cumulated effects were not addressed in the present study. Individuals with asthma or hay fever symptoms seem to reduce alcohol intake (a healthy drinkers' effect).

Section snippets

INTRODUCTION

Alcohol consumption has been linked to an increased prevalence of IgE sensitization.1, 2, 3, 4 Increasing alcohol consumption is known to increase total IgE levels, the ethanol metabolite acetaldehyde has a direct histamine-releasing effect,5 and alcohol is a common trigger of exacerbations in asthmatic white patients6 and flushing syndrome in Asian individuals.5 Yet the impact of alcohol use on specific IgE synthesis is still controversial, because the available studies present contradictory

Participants

Students aged 18 to 35 years from the universities in the area of Copenhagen, Denmark, underwent SPT in October or November 2002. On location, our SPT facility was strategically situated near lecture halls or large canteens. Passers-by were asked to participate and complete a questionnaire. All participants were informed that the aim of the survey was to study the pathogenesis of allergic disorders. The local ethics committee of Copenhagen approved the study.

Skin Prick Testing

Two technicians (K.A. and a study

RESULTS

In total, 1,668 volunteering individuals (61% female) aged 18 to 35 years were enrolled in the study. Approximately 58,000 students (56% female) were attached to the universities in the Copenhagen area in 2002, but we have no relevant data on these nonattenders. Table 1 indicates that SPT positivity was positively associated with male sex, increasing age, atopic predisposition, and absent history of pet ownership (Table 1). Concerning alcohol consumption patterns, men consumed significantly

DISCUSSION

Our study suggests that alcohol consumption is not positively related to either pollen or overall SPT positivity as previously suggested.2,3 The strengths of our study are the sample size and homogeneity. Of the comparable studies, ours presents the largest population with the narrowest span of age and social class: university students aged 18 to 35 years.1 Half of the previous studies did not consider the impact of social differences in their conclusions1,2; only Linneberg et al3,4 adjusted

ACKNOWLEDGMENTS

We thank study nurses Anna Durst-Andersen, Birgit Sorensen, and Rita Beier for their exquisite assistance.

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    Drs Assing and Bodtger contributed equally to this work.

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