Table 1.
Cohort characteristics
| Characteristic | CMA (n = 3499) | non‐CMA (n = 3499) | p‐value |
|---|---|---|---|
| Male, n (%) | 1896 (54) | 1896 (54) | >.9 |
| Country of residence, n (%) | <.001 | ||
| England | 968 (28) | 1285 (37) | |
| Northern Ireland | 607 (17) | 385 (11) | |
| Scotland | 978 (28) | 1033 (30) | |
| Wales | 946 (27) | 796 (23) | |
| IMD quintile, n (%) | .071 | ||
| 5th | 776 (23) | 788 (23) | |
| 4th | 916 (27) | 915 (27) | |
| 3rd | 597 (18) | 546 (16) | |
| 2nd | 378 (11) | 449 (13) | |
| 1st | 743 (22) | 726 (21) | |
| Ethnicity, n (%) | <.001 | ||
| White | 1207 (93) | 1265 (87) | |
| Mixed/multiple ethnic groups | 17 (1.3) | 31 (2.1) | |
| Asian/Asian British | 51 (3.9) | 85 (5.8) | |
| Black/Black British | 19 (1.5) | 59 (4.0) | |
| Other | 10 (0.8) | 17 (1.2) | |
| Presence of “other” allergya, n (%) | 547 (16) | 184 (5.3) | <.001 |
| Family history of allergyb, n (%) | 55 (1.6) | 25 (0.7) | .001 |
Abbreviations: CMA, cow's milk allergy; IMD, index of multiple deprivation, 5th, most deprived; 1st, least deprived.
a
Including read‐codes documented in case records for egg allergy, peanut allergy, food allergy, history of drug allergy, history of nondrug allergy and allergic reaction unspecified.
b
Including read‐codes documented in case records for family history of allergic disorders, allergy, atopy, eczema and hay fever.