Stratified factors | Non-exposed group | Fetal-exposed group | Infant-exposed group | Preschool-exposed group | P for interaction |
Areas | 0.838 | ||||
Less severe | Ref | 0.90 (0.63 to 1.30) | 1.26 (0.82 to 1.95) | 1.06 (0.76 to 1.48) | |
Severe | Ref | 1.03 (0.78 to 1.37) | 1.91 (1.41 to 2.59)* | 1.24 (0.98 to 1.56) | |
Sex | <0.001 | ||||
Male | Ref | 0.90 (0.64 to 1.28) | 1.16 (0.80 to 1.69) | 1.05 (0.79 to 1.40) | |
Female | Ref | 1.04 (0.78 to 1.40) | 2.21 (1.57 to 3.11)* | 1.26 (0.97 to 1.62) | |
BMI (kg/m2) | 0.023 | ||||
<24.0 | Ref | 0.99 (0.73 to 1.34) | 1.21 (0.86 to 1.70) | 1.01 (0.78 to 1.30) | |
≥24.0 | Ref | 0.96 (0.69 to 1.34) | 2.46 (1.70 to 3.55)* | 1.38 (1.04 to 1.85)** |
All analyses were adjusted for gender, BMI, parents’ and their own highest educational attainment, smoking status, drinking status and physical activity level.
*P<0.001, **p<0.05.
BMI, body mass index; Ref, reference group.