Table 2. Spearman Correlation Coefficients and 95% Confidence Intervals (CI) for Prenatal Mn Levels in Tooth Dentin With Mn Levels in Tooth Enamel, Maternal and Cord Blood, and Maternal Urine.
| spearman
correlation coefficients (95% CI) with Mn levels in tooth dentin |
||||
|---|---|---|---|---|
| biomarker | time period | second trimester | third trimester | prenatal |
| enamel (Mn:Ca) | second trimester | 0.30 (0.05, 0.52)b | 0.24 (−0.02, 0.47)a | 0.35 (0.10, 0.55)c |
| third trimester | 0.40 (0.16, 0.60)c | 0.42 (0.18, 0.60)c | 0.50 (0.28, 0.67)c | |
| prenatal | 0.41 (0.17, 0.61)c | 0.33 (0.09, 0.54)c | 0.47 (0.24, 0.64)c | |
| blood (μg/L) | 26 weeks gestation | –0.27 (−0.53, 0.25) | 0.02 (−0.29, 0.32) | –0.16 (−0.44, 0.15) |
| delivery | 0.09 (−0.24, 0.40) | 0.12 (−0.20, 0.42) | 0.09 (−0.22, 0.39) | |
| cord | 0.19 (−0.12, 0.47) | 0.31 (0.02, 0.55)b | 0.11 (−0.19, 0.38) | |
| urine (μg/L) | 26 weeks gestation | 0.18 (−0.12, 0.44) | 0.00 (−0.28, 0.28) | 0.02 (−0.26, 0.29) |
a
p < 0.1.
b
p < 0.05.
c
p < 0.01.