Number of children who had a measurement of cord serum IgE level at birth and at different ages by cord serum IgE levels
| Level of cord serum IgE | Birth(n = 1358) | 1–2 years | 4 years | 10 years | ||
|---|---|---|---|---|---|---|
| Asthma(n = 1194) | Asthma(n = 1068) | SPT(n = 862) | Asthma(n = 1191) | SPT(n = 900) | ||
| SPT, skin prick test. | ||||||
| <0.5 | 1184 (87.2) | 1044 (87.4) | 928 (86.9) | 748 (86.8) | 1040 (87.3) | 789 (87.7) |
| ⩾0.5 | 174 (12.8) | 150 (12.6) | 140 (13.1) | 114 (13.2) | 151 (12.7) | 111 (12.3) |