Table 3 Multivariate linear regression for the association between breakfast intake frequency during pregnancy and infant birth weight, stratified by energy intake
| Â | Energy intake | |||||||
|---|---|---|---|---|---|---|---|---|
First quartile | Second quartile | Third quartile | Fourth quartile | |||||
Frequency of breakfast intake | βa | (95% CI) | βa | (95% CI) | βa | (95% CI) | βa | (95% CI) |
Pre- to early pregnancy | ||||||||
 Everyday | Ref |  | Ref |  | Ref |  | Ref |  |
 5–6 times/week | -6.2 | (-39.1, 26.8) | 3.9 | (-29.1, 37.0) | -16.0 | (-50.3, 18.3) | -26.3 | (-62.7, 10.1) |
 3–4 times/week | -34.7 | (-70.6, 1.2) | -48.4 | (-88.4, -8.4) | -23.5 | (-67.3, 20.3) | -58.1 | (-101.8, -14.4) |
 0–2 times/week | -26.7 | (-55.9, 2.4) | -23.5 | (-62.6, 15.7) | -47.3 | (-88.3, -6.4) | -64.9 | (-108.8, -21.0) |
Early to mid- pregnancy | ||||||||
 Everyday | Ref |  | Ref |  | Ref |  | Ref |  |
 5–6 times/week | -10.4 | (-43.4, 22.5) | -0.5 | (–35.2, 34.3) | 15.9 | (-21.1, 53.0) | -40.6 | (-76.9, -4.3) |
 3–4 times/week | -9.0 | (-46.1, 28.2) | -54.3 | (-96.5, -12.2) | -33.2 | (-84.5, 18.1) | -30.8 | (-80.0, 18.4) |
 0–2 times/week | -23.5 | (-57.3, 10.3) | -25.6 | (-72.5, 21.3) | -51.8 | (-101.9, -1.6) | -66.1 | (-122.9, -9.2) |