Table 1.
Prevalence of food allergy, based on self report and study criteria and food allergen sensitisation at varying ages
| FA Status | I year | 2 years | 4 years | 10 years | 18 years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No | % | 95% CI | No | % | 95% CI | No | % | 95% CI | No | % | 95% CI | No | % | 95% CI | |
| Reported food allergy | 108 | 8.5% | 7–10% | 106 | 9.1% | 7.4–10.8% | 111 | 9.1% | 7.5–10.7 | 117 | 8.6% | 7.1–10.1% | 103 | 8.0% | 6.5–9.5% |
| Food allergy (study criteria) | 67 | 5.3% | 4.2–6.7% | 51 | 4.4% | 3.4–5.7% | 61 | 5.0% | 3.9–6.4% | 35 | 2.3% | 1.7–3.3% | 52 | 4.1% | 3.2–5.4% |
| Availability of food allergy information | 1268 (87.1%) | 1159 (79.6%) | 1217 (83.6%) | 1368 (94%) | 1290 (88.6%) | ||||||||||
| Food sensitisation* | - | - | - | - | - | - | 31 | 3.4% | 2.2–4.4% | 46 | 4.4% | 3.4–5.9% | 182 | 21.4% | 18.8–24.3% |
| FA and SPT positive $ | 16 | 1.3% | 0.8–2.1% | 9 | 0.8% | 0.4–1.5% | 8 | 0.8% | 0.4–1.6% | 9 | 0.9% | 0.4–1.6% | 19 | 2.2% | 1.4–3.4% |
| Availability of food sensitisation Information | - | - | 980 (67.3%) | 1035 (71.1%) | 851 (58.5%) | ||||||||||
Note:
*
Skin prick tests at one and two years were carried out in only symptomatic children and hence it was not possible to calculate cohort prevalence
$
Total number of children with “food allergy information” was used as denominator as skin tests were carried out in only symptomatic children