Current rhinitis symptoms | Current allergic rhinitis symptoms | Eczema ever | |
Swimming pool attendance | |||
Never | 1 | 1 | 1 |
Ever | 0.69 (0.44–1.09) | 0.56 (0.34–0.94) | 1.84 (1.05–3.21) |
Subjects n# | 3099 | 3097 | 3058 |
Age when started attending pools yrs | |||
<2 | 0.86 (0.68–1.08) | 0.72 (0.54–0.96) | 1.00 (0.80–1.26) |
2–4 | 0.85 (0.71–1.01) | 0.76 (0.61–0.94) | 1.01 (0.85–1.20) |
>4 | 1 | 1 | 1 |
Subjects n# | 2843 | 2842 | 2862 |
Years attending pools in winter¶ | |||
0 | 1 | 1 | 1 |
1–5 | 0.84 (0.68–1.03) | 0.79 (0.61–1.01) | 1.70 (1.37–2.11) |
>5 | 0.92 (0.75–1.14) | 0.82 (0.64–1.06) | 1.71 (1.38–2.12) |
Subjects n# | 2915 | 2908 | 2927 |
Years attending pools in summer+ | |||
0–5 | 1 | 1 | 1 |
6–9 | 0.79 (0.64–0.98) | 0.75 (0.58–0.98) | 1.43 (1.16–1.78) |
>9 | 0.84 (0.69–1.02) | 0.70 (0.55–0.90) | 1.50 (1.23–1.83) |
Subjects n# | 2723 | 2718 | 2738 |
Current attendance in the last 12 months | |||
Never | 1 | 1 | 1 |
Only in summer | 0.91 (0.73–1.14) | 0.74 (0.57–0.97) | 1.38 (1.09–1.74) |
Summer and winter | 0.90 (0.69–1.17) | 0.76 (0.55–1.04) | 1.69 (1.29–2.21) |
Subjects n# | 3032 | 3029 | 3051 |
Data are presented as adjusted odds ratio (95% confidence interval), unless otherwise stated. Current rhinitis and allergic rhinitis symptom models adjusted for eczema ever and parental educational level. Eczema ever models adjusted for parental educational level. #: number of children included in the model varies because of missing data on the outcome or exposure variables. 102 children who reported attendance related to health conditions were excluded from the model;¶: refers to mid-September until mid-June (i.e. mainly indoor pools); +: refers to mid-June until mid-September (i.e. mainly outdoor pools).