Mercury quantile | Maternal folate | Â | Crude | Adjusted |
---|
n | Case, n(%) | RR | 95% CI | p | RR | 95% CI | p |
---|
Q4 | Low | 64 | 39 (60.9) | 1.00 | Â | Â | 1.00 | Â | Â |
Adequate | 236 | 103 (43.6) | 0.72 | 0.56–0.91 | 0.007 | 0.66 | 0.51–0.85 | 0.001 |
Q1-Q3 | Low | 195 | 85 (43.6) | 1.00 | Â | Â | 1.00 | Â | Â |
Adequate | 714 | 289 (40.5) | 0.93 | 0.77–1.11 | 0.427 | 0.96 | 0.80–1.15 | 0.658 |
P for interaction | Â | Â | Â | Â | 0.095 | Â | Â | 0.086 |
- Q quartile. Mercury quartile range: Q1 0.39–3.68 μg/L; Q4 3.70–27.8 μg/L. Adequate folate was defined as plasma folate ≥ 20.4 nmol/L; low folate was defined as plasma folate < 20.4 nmol/L
- Adjusted for maternal race, smoking, education, parity, pre-pregnancy overweight or obesity, diabetes, hypertensive disorder, preterm birth, fetal growth pattern, and breastfeeding status