We conducted this study to evaluate blood levels of lead, mercury, and organochlorine compounds in newborns in the Province of Quebec.
During 1993 to 1995, we carried out a survey in 10 hospitals located in southern Quebec.
During that time, umbilical cord blood samples were obtained from 1 109 newborns, and we analyzed each for lead, mercury, 14 polychlorinated biphenyl congeners, and 11 chlorinated pesticides.
We used the geometric mean and 95% confidence interval (Cl) to describe the results.
Mean concentrations of lead and mercury in cord blood were 0.076 mumol/l (95% Cl=0.074,0.079) and 4.82 nmol/l (95% Cl=4.56,5.08), respectively.
The mean concentrations of total polychlorinated biphenyls (Aroclor 1260) and dichlorodiphenyl dichloroethylene were 0.514 mug/l (95% Cl=493,0.536) and 0.412 mug/l (95% Cl=0.390,0.435), respectively.
We observed a statistically significant relationship between maternal age and cord blood concentrations of (a) lead, (b) mercury, (c) polychlorinated biphenyls, and (d) dichlorodiphenyl dichloroethylene.
In addition, maternal smoking during pregnancy was associated with cord blood lead levels.
The cord blood concentrations of lead, mercury, polychlorinated biphenyls, and dichlorodiphenyl dichloroethylene we measured in our study were the lowest levels recently reported in industrialized countries. (...)
Mots-clés Pascal : Plomb, Mercure, Organochloré, Métal lourd, Taux, Cordon ombilical, Epidémiologie, Nouveau né, Homme, Québec, Canada, Amérique du Nord, Amérique, Pollution, Environnement
Mots-clés Pascal anglais : Lead, Mercury, Organochlorine compounds, Heavy metal, Rate, Umbilical cord, Epidemiology, Newborn, Human, Quebec, Canada, North America, America, Pollution, Environment
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0130343
Code Inist : 002B03M01. Création : 16/11/1999.