Table 5.
NBCS Pairwise Correlation (Spearman’s ρ) and median concentration change between enrollment (1st or 2nd trimester) and delivery
| Metal | Na | Correlation (p-value) | Concentration Δ in μg/g creatinine (p-value) | % Change |
|---|---|---|---|---|
| Cd | 195 | 0.540 (<0.001) | −0.060 (<0.001) | −27.4% |
| Hg | 193 | 0.502 (<0.001) | 0.010 (0.153) | +6.3% |
| Mn | 195 | 0.133 (0.091) | 0.109 (<0.001) | +41.7% |
| Pb | 196 | 0.435 (<0.001) | −0.003 (0.910) | −1.6% |
| As (total) | 192 | 0.339 (<0.001) | 0.64 (0.002) | +14.3% |
| Tl | 196 | 0.229 (<0.001) | −0.02 (0.002) | −14.6% |
| U | 195 | 0.452 (<0.001) | 0.000 (0.524) | −4.0% |
Note
a
number of paired enrollment and delivery samples; metal concentration presented in creatinine corrected units, μg/g creatinine