Findings This cross-sectional study linking Quest Diagnostics childhood lead testing and US Census data captured individual- and community-level disparities in

Findings This cross-sectional study linking Quest Diagnostics childhood lead testing and US Census data captured individual- and community-level disparities in lead exposure from October 2018 through February 2020. In adjusted models, the proportion of children with detectable (≥1.0 μg/dL) and elevated (≥5.0 μg/dL) [Blood Lead Levels] BLLs increased significantly among those with public insurance and for progressive quintiles of community pre-1950s housing and poverty. Results Of the 1,141,441 children (586,703 boys [51.4%]; mean [SD] age, 2.3 [1.4] years) in the study, more than half of the children tested (576,092 [50.5%; 95% CI, 50.4%-50.6%]) had detectable BLLs, and 21,172 children (1.9% [95% CI, 1.8%-1.9%]) had BLLs of 5.0 μg/dL or more. https://jamanetwork.com/journals/jamapediatrics/article-abstract/2784260 https://jamanetwork.com/journals/jamapediatrics/article-abst...