Table 1.
Fetal mercury, immunoglobulin, and antinuclear autoantibody levels by maternal characteristics.
| Cord blood mercury (log transformed) | Cord blood total IgG | Cord blood total ANA | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Maternal characteristic | (n) | GM | 95% CI | (n) | GM | 95% CI | (n) | mean | 95% CI |
| Blood Hg | |||||||||
| 1st tertile | 18 | 0.81 | (0.48, 1.38) | 19 | 6.03 | (2.25, 16.15) | 21 | 14.29 | (−1.97, 30.54) |
| 2nd tertile | 19 | 1.82 | (1.63, 2.05) | 20 | 14.17 | (6.37, 31.53) | 20 | 23.50 | (−10.43, 57.43) |
| 3rd tertile | 20 | 2.32 | (1.96, 2.75) | 19 | 17.55 | (7.09, 43.44) | 20 | 4.50 | (1.29, 7.71) |
| Age | |||||||||
| <18 | 21 | 1.65 | (1.30, 2.10) | 21 | 12.05 | (5.56, 26.12) | 23 | 17.39 | (−11.27, 46.05) |
| 18–24 | 19 | 1.99 | (1.63, 2.43) | 21 | 12.65 | (4.73, 33.86) | 21 | 11.91 | (2.73, 21.08) |
| >25 | 17 | 1.05 | (0.57, 1.90) | 16 | 9.50 | (3.44, 26.23) | 17 | 12.35 | (−7.85, 32.56) |
| Education | |||||||||
| None | 11 | 1.60 | (1.16, 2.20) | 10 | 5.93 | (1.64, 21.35) | 11 | 36.35 | (−27.74, 100.47) |
| Primary | 39 | 1.52 | (1.15, 2.01) | 37 | 14.73 | (8.36, 25.93) | 39 | 10.26 | (1.10, 19.41) |
| Secondary | 11 | 1.54 | (0.80, 2.93) | 11 | 9.09 | (1.60, 51.54) | 11 | 5.46 | (−3.23, 14.14) |
| Child’s sex | |||||||||
| Male | 29 | 1.56 | (1.06, 2.30) | 26 | 13.27 | (5.97, 29.52) | 29 | 21.72 | (−2.95, 46.40) |
| Female | 32 | 1.51 | (1.22, 1.87) | 32 | 10.21 | (5.22, 20.00) | 32 | 7.19 | (1.10, 13.28) |
| Residence | |||||||||
| Itaituba | 23 | 1.74 | (1.29, 2.34) | 21 | 12.00 | (4.56, 31.56) | 23 | 6.96 | (1.67, 12.24) |
| Belem | 13 | 1.50 | (1.08, 2.09) | 13 | 5.43 | (1.50, 19.69) | 13 | 34.62 | (−18.85, 88.08) |
| Other | 18 | 1.84 | (1.39, 2.44) | 18 | 19.88 | (9.72, 40.66) | 5 | 34.00 | (−53.62, 121.62) |
| Sao Luis | 9 | 0.55 | (0.06, 4.81) | 4 | 3.96 | (0.61, 25.75) | 18 | 4.44 | (−1.01, 9.90) |
GM: geometric mean; ANOVA for means comparisons. Total blood Hg levels presented as log transformed ppm; total IgG levels presented as mg/ml; total antinuclear autoantibody (ANA) values presented as inverse titer.