Table 4. Relationship between adequacy of sun exposure before the age of 24 months and prevalence of allergic diseases.
| Sunlight exposure before 24 months of age | Symptom, ever | Symptom, recent 1 yr | Diagnosis, ever | Treatment, recent 1 yr | ||||
|---|---|---|---|---|---|---|---|---|
| aOR† (95% CI) | P value | aOR† (95% CI) | P value | aOR† (95% CI) | P value | aOR† (95% CI) | P value | |
| Asthma* | 1.30 (1.02–1.65) | 0.031 | 0.74 (0.47–1.15) | 0.179 | 1.54 (1.15–2.06) | 0.004 | 1.06 (0.66–1.70) | 0.815 |
| Allergic rhinitis* | 1.25 (1.05–1.48) | 0.011 | 1.35 (0.90–2.01) | 0.148 | 1.40 (1.17–1.67) | <0.001 | 1.20 (0.99–1.46) | 0.060 |
| Atopic dermatitis* | 1.30 (1.07–1.57) | 0.008 | 0.85 (0.59–1.21) | 0.359 | 1.26 (1.06–1.51) | 0.010 | 1.26 (0.99–1.60) | 0.059 |
| Food allergy* | 1.00 (0.8–1.26) | 0.971 | 1.08 (0.74–1.57) | 0.686 | 0.77 (0.54–1.11) | 0.16 | 0.88 (0.49–1.60) | 0.678 |
Parent's allergic disease includes asthma, allergic rhinitis, atopic dermatitis, and food allergy.
aOR, adjusted odds ratio; CI, confidence interval.
*Insufficient (reference: sufficient). †Odds ratios are calculated with adjustment by sex, age, body mass index, type of delivery, use of antibiotics before the age of 12 months, duration of breast feeding, and parental history of allergic diseases.