Variable | Total, n = 4494 | Allergic rhinitis†‡, n = 579 (11.6%) | Perennial rhinitis†§, n = 549 (11.0%) |
n (%) | n (%) | n (%) | |
Sex | *** | ||
Female | 2522 (50.5) | 336 (13.3) | 270 (11.1) |
Male | 2472 (49.5) | 243 (9.9) | 279 (11.6) |
Educational level | ** | * | |
High¶ | 2978 (59.6) | 376 (12.7) | 350 (12.1) |
Low | 2016 (40.4) | 203 (10.1) | 199 (10.2) |
Smoking | ** | ||
Never smokers | 2105 (42.2) | 265 (12.6) | 216 (10.6) |
Ex-smokers | 1334 (26.7) | 167 (12.6) | 166 (12.8) |
Current smokers | 1555 (31.1) | 147 (9.5) | 167 (11.0) |
Parental allergy | *** | *** | |
No | 3338 (66.8) | 350 (10.5) | 325 (10.0) |
Yes | 1193 (23.9) | 181 (15.2) | 137 (12.0) |
Don’t know | 463 (9.3) | 48 (10.4) | 87 (19.3) |
Specific IgE to common allergens†† | *** | ||
No | 3372 (82.9) | 296 (8.8) | 377 (11.5) |
Yes | 696 (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.