Anthropometric and questionnaire data for subjects classified according to body mass index (BMI)
| Underweight (BMI <18.5) | Normal (BMI 18.5–24.9) | Overweight (BMI 25.0–29.9) | Moderate obesity (BMI 30.0–34.9) | Severe obesity (BMI ⩾35.0) | p value | |
| No of subjects | 52 | 1127 | 592 | 141 | 59 | |
| % male | 17.3% | 37.9% | 60.1% | 48.9% | 30.5% | 0.000 |
| Age (years) | 26.7 (24.4 to 29.0) | 32.3 (31.7 to 32.9) | 35.9 (35.2 to 36.6) | 36.5 (35.1 to 37.9) | 34.6 (32.6 to 36.6) | |
| % atopic1-150 | 52.8 (39.4 to 66.2) | 42.1 (39.2 to 45.0) | 45.3 (41.3 to 49.3) | 47.2 (39.0 to 54.4) | 41.4 (38.7 to 54.1) | 0.27 |
| % with family history of asthma | 25.0 (13.2 to 36.8) | 21.8 (19.4 to 24.2) | 24.2 (20.7 to 27.7) | 19.9 (13.3 to 26.5) | 28.8 (17.2 to 40.4) | 0.51 |
| % wheeze in last 12 months | 33.3 (20.5 to 46.1) | 20.4 (18.0 to 22.8) | 19.8 (16.6 to 23.0) | 25.9 (18.7 to 33.1) | 37.9 (25.5 to 50.3) | 0.002 |
| % SOBOE in last 12 months | 40 (20.8 to 59.2) | 17.7 (15.0 to 20.4) | 21.2 (17.6 to 24.8) | 29.2 (21.1 to 37.3) | 49.0 (35.3 to 62.7) | 0.000 |
| % recent asthma | 17.0 (6.8 to 27.2) | 12.3 (10.4 to 14.2) | 10.4 (7.9 to 12.9) | 14.6 (8.8 to 20.4) | 21.7 (11.2 to 32.2) | 0.06 |
| % used medication in last 12 months | 11.4 (2.8 to 20.0) | 14.3 (12.3 to 16.3) | 13.4 (10.7 to 16.1) | 15.5 (9.5 to 21.5) | 35.3 (23.1 to 47.5) | 0.028 |
| % current smoker | 25 (13.2 to 36.8) | 15.4 (13.3 to 17.5) | 17.4 (14.3 to 20.5) | 18.4 (12.0 to 24.8) | 10.2 (2.5 to 17.9) | 0.18 |
SOBOE = shortness of breath on exertion.
Values are means and 95% confidence intervals or prevalence and 95% confidence intervals.
↵1-150 Atopy was defined as a positive reaction of ⩾3 mm to any of a panel of eight common aeroallergens.