Risk factors associated with asthma and rhinoconjunctivitis among Swedish farmers

Area of Science:

• Occupational Health
• Allergology
• Epidemiology

Background:

• Farming communities exhibit high respiratory symptoms.
• Storage mites are significant allergens in agricultural settings.
• This study investigates asthma and rhinoconjunctivitis risk factors in Swedish farmers.

Purpose of the Study:

• To identify risk factors for asthma and rhinoconjunctivitis among Swedish farmers.
• To assess the association between allergen sensitization and respiratory conditions.
• To evaluate the impact of occupational exposures on farmer health.

Main Methods:

• Epidemiologic survey of 1015 small-scale dairy farmers.
• Medical examinations including skin prick testing (SPT), RAST analyses, and lung-function measurements for 461 selected farmers.
• Multiple logistic regression analysis to assess risk factors for sensitization and respiratory diseases.

Main Results:

• Atopy prevalence was 26.7% among farmers.
• Sensitization to mites (OR=5.8) and pollens (OR=10.3) were significant risk factors for asthma.
• Sensitization to mites showed a significant relationship with working time (OR=5.2).
• Environmental tobacco smoke and animal exposure did not significantly affect risk.
• Farmers had lower FEV1 (forced expiratory volume in 1 second) compared to the general population.

Conclusions:

• Allergen sensitization, particularly to mites and pollens, is strongly linked to asthma and rhinoconjunctivitis in farmers.
• Allergen avoidance is crucial for preventing occupational respiratory diseases in this population.
• Findings highlight the importance of environmental controls and health surveillance in farming.