Table 1

Medical history and doctor visits. Data presented as N (%)

Medical proceduresCases (AR)
n=797
Controls (No AR)
n=314
Cases (AR) treated
n=730
Cases (AR) not
treated n=67
Tonsils removed127 (15.9%)*19 (6.1%)118 (16.2%)9 (13.4%)
Adenoids removed104 (13.0%)*19 (6.1%)98 (13.4%)*6 (9.0%)
Tubes put in his/her ears69 (8.7%)*12 (3.8%)67 (9.2%)*2 (3.0%)
Nasal or sinus surgery63 (7.9%)*3 (1.0%)59 (8.1%)4 (6.0%)
Required braces for their teeth195 (24.5%)*50 (15.9%)182 (24.9%)*13 (19.4%)
None of the above446 (56.0%)240 (76.4%)*400 (54.8%)46 (68.7%)*
Reasons for visits to the doctorCases (AR) n=729Controls (No AR) n=190Cases (AR) treated n=672Cases (AR) not treated n=57
Asthma38 (18.9%)*18 (9.5%)127 (18.9%)11 (19.3%)
Sinusitis84 (11.5%)*3 (1.6%)81 (12.1%)3 (5.3%)
Hay fever/AR (nasal and/or eye allergy symptoms)324 (44.4%)*1 (0.5%)311 (46.3%)*13 (22.8%)
Sleep disturbances45 (6.2%)*2 (1.1%)42 (6.3%)3 (5.3%)
Adenoids/tonsils hypertrophy50 (6.9%)*2 (1.1%)48 (7.1%)2 (3.5%)
Eczema (atopic dermatitis)72 (9.9%)*6 (3.2%)67 (10.0%)5 (8.8%)
Vaccinations121 (16.6%)*17 (8.9%)116 (17.3%)*5 (8.8%)
Cough322 (44.2%)*62 (32.6%)295 (43.9%)27 (47.4%)
Nasal polyps26 (3.6%)*1 (0.5%)26 (3.9%)*0 (0.0%)
Hives (urticaria)21 (2.9%)*1 (0.5%)20 (3.0%)1 (1.8%)
Respiratory tract infection139 (19.1%)*18 (9.5%)134 (19.9%)*5 (8.8%)
Urinary tract infection24 (3.3%)4 (2.1%)20 (3.0%)4 (7.0%)
Acne39 (5.3%)5 (2.6%)37 (5.5%)2 (3.5%)
Other183 (25.1%)114 (60.0%)*161 (24.0%)22 (38.6%)*
  • *Statistically significant difference between groups (cases versus controls; cases treated versus not treated) at 95% CI. The list of reasons was prespecified in the survey questionnaire.

  • †Sample size smaller than the total population due to missing data.

  • AR, allergic rhinitis.