Factors associated with breathlessness in parents
| Parental factor | Unadjusted OR (95% CI) | Adjusted OR (95% CI) |
| Age (per 1 year) | 1.0 (1.0 to 1.0) | 1.0 (0.9 to 1.0) |
| Female versus male | 0.9 (0.8 to 1.1) | 0.5 (0.3 to 0.8) |
| Body Mass Index (kg/m2) | ||
| <20 | 1.0 (0.7 to 1.4) | 1.2 (0.6 to 2.3) |
| 20–<25 | 1 (ref) | 1 (ref) |
| 25–<30 | 1.2 (1.0 to 1.4) | 1.5 (0.7 to 2.9) |
| ≥30 | 1.7 (1.3 to 2.39) | 2.3 (1.0 to 5.1) |
| Asthma | 15.1 (11.1 to 20.4) | 16.3 (10.1 to 26.1) |
| Current smoker | 1.9 (1.6 to 2.4) | 2.0 (1.3 to 2.9) |
| Pack-year of smoking (per one unit) | 1.0 (1.0 to 1.0) | 1.0 (1.0 to 1.0) |
| Depression | 2.1 (1.6 to 2.8) | 1.8 (1.2 to 2.7) |
| Highest education | ||
| Primary | 1.3 (0.9 to 1.8) | 1.1 (0.6 to 1.8) |
| Secondary | 1 (ref) | 1 (ref) |
| University | 1.1 (0.9 to 1.3) | 1.3 (1.0 to 1.9) |
| FEV1/FVC<0.7 | 4.7 (3.3 to 6.9) | 3.5 (1.5 to 8.3) |
| FVC (per 1 L) | 0.9 (0.8 to 1.0) | 0.7 (0.5 to 0.8) |
Associations analysed using random effects logistic regression accounting for clustering by study centre. Unadjusted analyses were conducted for each factor separately. In the adjusted model, each factor was adjusted for all other factors in the model.
ref, reference.