Table 3

Crude and adjusted prevalence of rhinitis symptoms, hay fever and sensitisation rates in three consecutive surveys, total sample and subsample with serologic measurements

Health outcome1992–19931995–19971999–2000p‐value for trend
Total sample parental questionnaire n132416681250
Sneezing attack without cold and itchy watery eyes last year15.113.2 (11.1–15.3)12.110.3 (8.8–12.0)13.411.5 (7.9–13.5)0.26
Hay fever17.816.5 (14.4–18.8)15.713.9 (12.1–15.8)18.816.1 (13.9–18.4)0.89
Subsample with IgE measurements n743831587
Sneezing attack without cold and itchy watery eyes last year17.213.9 (11.4–16.8)13.811.3 (9.2–13.8)16.015.1 (12.1–18.6)0.60
Hay fever19.817.1 (14.3–20.2)18.115.6 (13.0–18.5)19.618.3 (14.8–22.0)0.63
SX1 CAP class ≥235.534.6 (30.8–38.4)37.838.9 (35.2–42.6)36.835.6 (31.3–40.0)0.77
Outdoor allergens CAP class ≥231.230.6 (27.0–34.3)31.431.9 (28.5–35.5)28.327.4 (23.5–31.5)0.26
Indoor allergens CAP class ≥221.819.8 (16.8–23.1)24.224.1 (21.0–27.5)21.619.9 (16.5–23.6)0.96
  • Data are presented as % or % (95% confidence interval) unless otherwise stated

  • Symptom rates were adjusted for study year, sex, parental education, study area, maternal and paternal asthma and hay fever, breastfeeding, number of siblings, heating system, carpets in student's bedroom, pet ownership, getting rid of carpets because of the child's allergy, students active smoking, mother filling in the questionnaire and parental perception of air pollution as a risk factor for their child's respiratory health

  • IgE: immunoglobulin E