Table 3 Prediction of birth weight of first-born child by BMI and smoking at 19 years of age and at the start of the first pregnancy
From: Impact of BMI and smoking in adolescence and at the start of pregnancy on birth weight
Model 1 At 19 years of age, n = 1006 | Model 2 At start of first pregnancy, n = 846 | |||||||
|---|---|---|---|---|---|---|---|---|
Aa R2 = 0.06 | Bb R2 = 0.24 | Aa R2 = 0.08 | Bb R2 = 0.24 | |||||
Beta (95% CI) | p value | Beta (95% CI) | p value | Beta (95% CI) | p value | Beta (95% CI) | p value | |
Maternal Birth Weight (100 g) | 22.1 (16.6; 27.5) | < .0001 | 19.0 (14.0; 24.0) | < .0001 | 20.1 (14.1;26.0) | < .0001 | 19.5 (14.1;24.9) | < .0001 |
BMI (kg/m2) | 7.0 (-4.1; 18.0) | 0.22 | 3.2 (-6.8; 13.3) | 0.53 | 14.9 (6.0; 23.8) | 0.0010 | 12.1 (4.0; 20.3) | 0.0033 |
Smoking | -29.9 (-89.8;30.1) | 0.33 | -30.3 (-84.6; 24.0) | 0.27 | -180.5 (-275.7; -85.4) | 0.0002 | -154.1 (-241.1;-67.2) | 0.0005 |