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1 Department of Pediatrics, Community and Preventive Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York
2 Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York
3 Department of Biostatistics, University of Rochester School of Medicine and Dentistry, Rochester, New York
Objective. Dust control is recommended as one of the cornerstones of controlling childhood lead exposure; however, the effectiveness of dust control has not been demonstrated for children who have low to mild elevations in blood lead (ie, less than 25 µg/dL). The objective of this study was to determine whether dust control, as performed by families, had an effect on children's blood lead levels and dust lead levels in children's homes.
Design. Randomized, controlled trial.
Setting. Community-based trial in Rochester, NY.
Participants. One hundred four children, 12 to 31 months of age at baseline.
Intervention. Families and children were randomized to one of two groups. Families of children in the intervention group received cleaning supplies, information about cleaning areas that are often contaminated with lead, and a cleaning demonstration. Families in the control group received only a brochure about lead poisoning prevention.
Outcome Measures. Baseline measurements of lead in blood, house dust, soil, water, and paint were taken from both groups. Seven months after enrollment, a second blood lead assay was obtained, and lead levels in household dust were measured. The main outcome measures were change in blood lead levels and dust lead levels by treatment group.
Results. The median blood lead level of children enrolled in the study was 6.7 µg/dL (range, 1.7 to 30.6 µg/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 -0.05 µg/dL compared with -0.60 µg/dL among those in the control group. 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 percentage of change in dust lead levels on noncarpeted floors, which was greater among houses in the intervention group.
Conclusions. These data suggest that an intervention that consists only of providing cleaning supplies and a brief description of dust control is not effective at reducing blood lead levels among urban children with low to mild elevations in blood lead levels at a 7-month followup.
Submitted on August 14, 1995
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