Modela | Caffeine source | Birth weight (Marsal) | Birth weight (Skjaerven) | Birth weight (Gardosi) | ||||||
---|---|---|---|---|---|---|---|---|---|---|
 |  | β (g) 95% CI | Pvalue | β (g) 95% CI | Pvalue | β (g) 95% CI | Pvalue | |||
Pre-pregnancy: | ||||||||||
I | Total | -3 | -5 to-2 | <10-6 | -2 | -4 to-1 | <10-3 | -1 | -3 to 0 | 0.04 |
 | Coffee, all types | -3 | -4 to-2 | <10-4 | -2 | -3 to 0 | 0.02 | -1 | -3 to 0 | 0.07 |
 | Caffeinated soft drinksb | -3 | -7 to 1 | 0.1 | -4 | -8 to 0 | 0.06 | -1 | -5 to 3 | 0.6 |
 | Black tea | -16 | -23 to-9 | <10-5 | -16 | -23 to-8 | <10-4 | -6 | -13 to 1 | 0.1 |
II | Total | 1 | -1 to 3 | 0.3 | 2 | 0 to 3 | 0.03 | 2 | 1 to 4 | 0.003 |
 | Coffee, all types | 1 | -1 to 3 | 0.2 | 2 | 0 to 4 | 0.02 | 3 | 1 to 4 | <3 × 10-3 |
 | Caffeinated soft drinksb | 4 | -3 to 10 | 0.3 | 3 | -3 to 10 | 0.3 | 5 | -1 to 11 | 0.1 |
 | Black tea | -12 | -21 to-2 | 0.02 | -13 | -22 to-3 | 0.01 | -3 | -12 to 7 | 0.6 |
17th week of gestation: | ||||||||||
I | Total | -9 | -12 to-7 | <10-17 | -8 | -10 to-6 | <10-13 | -7 | -9 to-5 | <10-10 |
 | Coffee, all types | -9 | -11 to-6 | <10-11 | -7 | -10 to-5 | <10-7 | -7 | -10 to-5 | <10-8 |
 | Caffeinated soft drinksb | -9 | -15 to-4 | <2 × 10-3 | -10 | -15 to-4 | <10-3 | -6 | -11 to-1 | 0.03 |
 | Black tea | -14 | -22 to-6 | <10-3 | -12 | -20 to-4 | <5 × 10-3 | -6 | -14 to 2 | 0.13 |
II | Total | -8 | -11 to-6 | <10-8 | -8 | -10 to-5 | <10-8 | -7 | -10 to-5 | <10-8 |
 | Coffee, all types | -8 | -11 to-4 | <10-5 | -8 | -11 to-4 | <10-5 | -7 | -10 to-4 | <10-4 |
 | Caffeinated soft drinksb | -13 | -22 to-5 | <3 × 10-3 | -13 | -22 to-4 | <4 × 10-3 | -12 | -20 to-3 | <7 × 10-3 |
 | Black tea | -1 | -12 to 9 | 0.8 | 2 | -9 to 13 | 0.8 | -3 | -14 to 7 | 0.5 |
30th week of gestation: | ||||||||||
I | Total | -8 | -10 to-6 | <10-13 | -7 | -9 to-5 | <10-10 | -6 | -8 to-4 | <10-7 |
 | Coffee, all types | -9 | -11 to-6 | <10-10 | -7 | -9 to-4 | <10-7 | -7 | -10 to-5 | <10-8 |
 | Caffeinated soft drinksb | -2 | -6 to 3 | 0.5 | -3 | -7 to 2 | 0.3 | 0 | -5 to 4 | 0.9 |
 | Black tea | -18 | -27 to-10 | <10-4 | -18 | -27 to-9 | <10-4 | -8 | -16 to 1 | 0.08 |
II | Total | -5 | -7 to-3 | <10-4 | -5 | -7 to-3 | <10-4 | -4 | -7 to-2 | <10-3 |
 | Coffee, all types | -6 | -9 to-3 | <10-3 | -5 | -9 to-2 | <2 × 10-3 | -6 | -9 to-3 | <10-4 |
 | Caffeinated soft drinksb | -1 | -6 to 5 | 0.8 | -1 | -6 to 4 | 0.7 | 0 | -5 to 5 | 0.9 |
 | Black tea | -14 | -24 to-4 | <5 × 10-3 | -15 | -25 to-5 | <3 × 10-3 | -6 | -16 to 3 | 0.2 |