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Background. Dust-control is recommended as one of the cornerstones of controlling childhood lead exposure; however, its effectiveness has not been demonstrated for children who have low elevations in blood lead (i.e., < 25 ug/dL). This study was done to determine whether dust control, as performed by families, has an effect on children's blood lead levels and dust lead levels in their homes. Methods. A prospective, randomized trial was conducted among 104 families with children, 18 to 36 months of age. Families of children in the Intervention Group received cleaning supplies, information about cleaning areas which are often contaminated with lead, and a cleaning demonstration. Baseline measurements of blood lead and hand lead levels were done, and samples were taken from house dust, soil, water, and paint. Seven months after enrollment, a repeat blood lead assay was obtained, and lead levels on children's hands and in household dust were measured. Results. The median blood lead level of children enrolled in the study was 6.7 μg/dL (range = 1.7 to 30.6ug/dL). There was no significant difference in the change of children's blood lead levels or dust lead levels by treatment group. The median change in blood lead levels among children in the Intervention Group was -.05 μg/dL compared to -.60 μg/dL among those in the Control Group (p = 0.95). There also was no significant difference in the change of dust lead by group assignment, although there was a trend toward a significant difference in the percent change in dust lead levels on non-carpeted floors, which was greater among houses in the Intervention Group(p = 0.08). Conclusions. These data suggest that a modest intervention consisting only of providing cleaning supplies and a brief description of dust control is not effective in reducing blood lead levels among urban children with low to mild elevations in blood lead levels.

A RANDOMIZED TRIAL OF THE EFFECT OF DUST CONTROL ON CHILDREN'S BLOOD LEAD LEVELS. † 627