ALB and anemia: The infant birth weight-serum ALB correlation was consistent in the subgroups below (all P for interaction >0.05): gestation age at delivery (28–33 + 6, 34–36 + 6, ≥ 37 weeks), pre pregnancy BMI (<18.5, 18.5–24.9, ≥ 24.9 kg/m2), anemia (<70, 70–99, 100–109, ≥  110 g/L), parity (0, 1–2, ≥ 3 times), maternal age ( < 25, 25–34, ≥  35 y), education (no formal education, primary, secondary/university+), sex of the newborn (male vs. female), antenatal visits (0–4 vs. ≥  5), and smoking habit (no vs. yes).