Sex, male, n (%) | 135 (49.1) | 175 (45.2) | 147 (47.6) | 109 (43.8) |
Age (years), mean (sd), (range) | 8.0 (±0.1) (7.1–8.6) | 11.5 (±0.5) (10.0–12.8) | 16.1 (±0.5) (14.2–17) | 19.4 (±0.7) (18.0–21.8) |
Ethnicity, white, n (%) | 266 (97.8) | 370 (97.4) | 292 (96.7) | 233 (97.1) |
Height (cm), mean (sd), (range) | 128 (±5.0) (116–145) | 149 (±7.2) (130–170) | 170.1 (±8.6) (150–196) | 171.7 (±9.5) (151–198) |
Weight (kg), mean (sd), (range) | 28 (±5.1) (20–51) | 42.7 (±9.9) (23.6–91.4) | 63.3 (±11.6) (42.3–116) | 69.6 (±13.5) (46.3–138) |
Body mass index (kg·m−2), mean (sd), (range) | 16.9 (±2.2) (13.1–26.3) | 19.1 (±3.3) (12.9–40.8) | 21.9 (±3.4) (16.2–37.4) | 23.5 (±4.0) (16.6–41.3) |
SPT sensitisation, n (%) | 64 (23.3) | 93 (24) | 141 (45.6) | 114 (45.8) |
Current eczema (self-reported), n (%) | 36 (13.2) | 59 (15.6) | 28 (9.1) | 28 (11.3) |
Current hay fever (self-reported) n(%) | 30 (11.4%) | 71 (18.8%) | 97 (32.4%) | 90 (36.1%) |