|
|
Perchlorate
Comparison
of urinary iodine concentrations between the Chilean school age children and 6
to 11 year old children in the U.S.
|
|
Children
in U.S. 1971-1974 (NHANES I1) |
Children
in U.S. 1988-1994 (NHANES III1) |
Children
in Chile2 |
||
|
Antofagasta
(control) |
Chanaral
(low perchlorate exposure) |
Taltal
(high perchlorate exposure) |
|||
|
Sample
size |
1826 |
3058 |
53 |
49 |
60 |
|
Urine
iodine (ug/dL) |
55.6±3.6 (48.5-62.7)3 |
30.5±1.9 (26.8-34.2) |
75.6±5.5 (64.5-86.7) |
61.4±5.1 (51.1-71.7) |
76.6±6.1 (64.4-88.8) |
|
Urine
iodine/creatinine (ug/g) |
619.3±46.0 (529.1~709.5) |
339.6±26.5 (287.7~391.5) |
1057.2±51.9 (952.9~1161.5) |
827.2±51.3 (724.0~930.4) |
947.4±49.6 (848.2~1046.6) |
All data are expressed as mean ± standard error (SE).
1. The data for the children in U.S. are for the 6-11 years old age group reported from National Health and Nutrition Examination Surveys I (1971-1974) and III (1988-1994) (Hollowell et al., 1998)
2.
The data for the children in Chile are for the 6-8 years old age group
reported by Crump
et al. (2000).
3.
The values in the parentheses indicate 95% confidence interval.
References:
Hollowell, J.G.,
Staehling, N.W., Hannon, W.H., Flanders, D.W., Gunter, E.W., Maberly, G.F.,
Braverman, L.E., Pino, S., Miller, D.T., Garbe, P.L., DeLozier, D.M., Jackson,
R.J.. et al. (1998). Iodine
nutrition in the United States. Trends and public health implications: iodine
excretion data from National Health and Nutrition Examination Surveys I and III
(1971-1974 and 1988-1994). J Clin Endocrinol Metab. 83:3398-400.
Crump, C., Michaud, P., Tellez, R., Reyes, C., Gonzalez, G., Montgomery, E. L., Crump, K. S., Lobo, G., Becerra, C., and Gibbs, J. P. (2000). Does perchlorate in drinking water affect thyroid function in newborns or school-age children? J. Occ. Environ. Med. 42, 603-612.
For further information, contact Ms. Joan Strawson at 910-692-7752 or Strawson@tera.org
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Last updated: 01/03/2007