Table 1 Descriptive data of the study population at follow-up (ECRHS II)
VariableTotal, n = 4494Allergic rhinitis†‡, n = 579 (11.6%)Perennial rhinitis†§, n = 549 (11.0%)
n (%)n (%)n (%)
Sex***
    Female2522 (50.5)336 (13.3)270 (11.1)
    Male2472 (49.5)243 (9.9)279 (11.6)
Educational level***
    High¶2978 (59.6)376 (12.7)350 (12.1)
    Low2016 (40.4)203 (10.1)199 (10.2)
Smoking**
    Never smokers2105 (42.2)265 (12.6)216 (10.6)
    Ex-smokers1334 (26.7)167 (12.6)166 (12.8)
    Current smokers1555 (31.1)147 (9.5)167 (11.0)
Parental allergy******
    No3338 (66.8)350 (10.5)325 (10.0)
    Yes1193 (23.9)181 (15.2)137 (12.0)
    Don’t know463 (9.3)48 (10.4)87 (19.3)
Specific IgE to common allergens††***
    No3372 (82.9)296 (8.8)377 (11.5)
    Yes696 (17.1)174 (25.1)93 (13.8)
  • Only subjects neither asthma nor allergic rhinitis at baseline (n = 4994).

  • †Numbers do not add up to 100% as 137 subjects had symptoms of allergic and perennial rhinitis.

  • ‡n = 10 missing.

  • §n = 141 missing.

  • ¶Age at end of full-time education ⩾19 years.

  • ††n = 926 missing due to missing data on IgE.

  • ***χ2 p<0.001, **χ2 p<0.01, *χ2 p<0.05 compared to subjects without symptoms.