Table 2.
Unadjusted associations between covariates and tooth Mn (ln 55Mn:43Ca) around time of birtha
| N | Beta (95% CI) | |
|---|---|---|
| Child sex, female vs. male | 138 | 0.08 (−0.11, 0.27) |
| Gestational age at birth (wks) | 135 | −0.01 (−0.07, 0.05) |
| Preterm birth (<37 wks gestation) vs. normal | 135 | 0.07 (−0.34, 0.47) |
| Birth weight (g) | 135 | 0.16 (−0.07, 0.38) |
| Mother’s age at delivery (yrs) | 131 | 0.01 (−0.01, 0.03) |
| ≥30 yrs old vs. <30 | 131 | 0.02 (−0.19, 0.23) |
| Mother’s education, <12 yrs school vs. ≥12 yrs | 130 | 0.09 (−0.10, 0.28) |
| Mother’s IQ score | 120 | −0.001 (−0.007, 0.004) |
| Mother smoked during pregnancy, yes vs. no | 117 | −0.77 (−1.58, 0.04) |
| Hemoglobin at 1 yr of age (g/dl) | 95 | −0.05 (−0.13, 0.03) |
| Hemoglobin at 2 yrs of age (g/dl) | 111 | 0.001 (−0.09, 0.10) |
| Anemic at 1 or 2 years of age, yes vs. no | 127 | 0.14 (−0.06, 0.34) |
| Study cohort (years of child birth) | ||
| 1 (1994–1995) vs. 3 (2001–2006) | 2 | −0.92 (−1.70, −0.14) |
| 2A (1997–2002) vs. 3 (2001–2006) | 19 | −0.17 (−0.45, 0.11) |
| 2B (1998–2001) vs. 3 (2001–2006) | 33 | −0.25 (−0.48, −0.03) |
a
Around time of birth defined as birth ± 3 days