| Original model | Original model adjusted for maternal sleep problems | |
| No maternal history of asthma or atopy | ||
| Underweight | 0.93 (0.79–1.10) | 0.94 (0.79–1.10) |
| Normal weight | Reference | Reference |
| Overweight | 1.09 (0.93–1.28) | 1.09 (0.93–1.28) |
| Obese | 0.88 (0.67–1.15) | 0.87 (0.67–1.14) |
| Pre-pregnancy BMI# | 1.01 (0.95–1.08) | 1.01 (0.94–1.08) |
| Maternal history of asthma or atopy | ||
| Underweight | 1.13 (0.93–1.39) | 1.13 (0.93–1.39) |
| Normal weight | Reference | Reference |
| Overweight | 0.98 (0.81–1.19) | 0.98 (0.81–1.18) |
| Obese | 1.47 (1.09–1.99)* | 1.44 (1.06–1.94)* |
| Pre-pregnancy BMI# | 1.06 (0.99–1.15) | 1.06 (0.98–1.15) |
Data are presented as OR (95% CI) and reflect the associations of different pre-pregnancy BMI groups with childhood wheezing, compared with those with a pre-pregnancy BMI of 20–24.9 kg·m−2, using generalised estimating equation models. #: tests for trend were based on generalised estimating equation models with pre-pregnancy BMI (sd scores) as a continuous variable, and reflect the association with wheezing per sd increase of pre-pregnancy BMI. *: p<0.05.