Risk Factors for Allergic Rhinitis

Established Risk Factors

The American Academy of Allergy, Asthma, and Immunology suggests that genetic predisposition, such as family history of atopy, significantly increases the risk of developing allergic rhinitis, with a stronger risk when both parents have atopic conditions compared to only one parent 4
Elevated serum IgE levels in early childhood, greater than 100 IU/mL before age 6 years, is a significant predictor of allergic rhinitis development, according to the American College of Allergy, Asthma, and Immunology 1, 2
Higher socioeconomic class is associated with increased prevalence of allergic rhinitis, as indicated by the American Academy of Allergy, Asthma, and Immunology 5, 4
Presence of a positive allergy skin prick test (SPT) indicates existing sensitization and higher risk, as stated by the American College of Allergy, Asthma, and Immunology 1, 3
Demographic factors such as race, with increased prevalence in non-white populations 5, birth order, with first-born children having higher risk 4, and gender, with boys outnumbering girls in childhood allergic rhinitis, but the ratio becoming equal or favoring women in adulthood 5

The American Academy of Allergy, Asthma, and Immunology notes that early and repeated exposure to specific allergens can lead to sensitization 3, 4
Exposure to indoor allergens like dust mites, mold, and animal dander 4, outdoor allergens such as pollens and seasonal molds 6, and occupational allergens 1 can contribute to the development of allergic rhinitis
Early introduction of foods or formula has been associated with increased risk, as reported by the American Academy of Pediatrics 4
Aeroallergen sensitization can occur as early as 6 months to 2 years of life, according to the American College of Allergy, Asthma, and Immunology 6
Heavy tobacco smoke exposure is associated with increased risk at age 1 year, as indicated by the American Academy of Pediatrics 4

The hygiene hypothesis suggests that the relationship between early childhood infections and allergic rhinitis development remains uncertain, with some studies indicating that early exposure to infections may reduce atopic disease, while others show increased infections in early life may increase allergic disease, as discussed by the American Academy of Allergy, Asthma, and Immunology 6, 4
The effect of early pet exposure shows conflicting results, with some studies suggesting early cat exposure may reduce atopy and asthma, while others show either no effect or increased allergic disease, as reported by the American College of Allergy, Asthma, and Immunology 4
Some evidence suggests increased prevalence in polluted urban areas, as indicated by the American Lung Association 5
Seasonal birth timing may influence pollen and dust mite sensitization, but findings are inconsistent, according to the American Academy of Allergy, Asthma, and Immunology 4

Allergic rhinitis develops before age 20 in 80% of cases, as stated by the American College of Allergy, Asthma, and Immunology 5
Seasonal allergic rhinitis typically develops between ages 2-7 years, as reported by the American Academy of Pediatrics 4
Perennial allergic rhinitis may present at a very early age, according to the American College of Allergy, Asthma, and Immunology 4
Seasonal allergic rhinitis is more common in children and adolescents, while perennial allergic rhinitis is more prevalent in adults, as indicated by the American Academy of Allergy, Asthma, and Immunology 6

Understanding these risk factors helps identify high-risk individuals who may benefit from early intervention, as suggested by the American College of Allergy, Asthma, and Immunology 1

Failing to distinguish between allergic and non-allergic rhinitis, which have different risk profiles, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 6
Not recognizing mixed rhinitis, which affects 44-87% of patients with allergic rhinitis, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 7