LAUSR

OBJECTIVES Expansion of insurance eligibility is associated with positive health outcomes. We compared uninsurance and health care utilization for (1) all children, and (2) children in immigrant families (CIF) and non-CIF who resided inside and outside of the seven US states/territories offering public health insurance to children regardless of documentation status ("extended-eligibility states/territories"). METHODS Using the cross-sectional, nationally representative National Survey of Children's Health-2019, we used survey-weighted, multivariable Poisson regression to assess the association of residence in nonextended- versus extended-eligibility states/territories with uninsurance and with health care utilization measures for (1) all children, and (2) CIF versus non-CIF, adjusting for demographic covariates. RESULTS Of the 29 433 respondents, the 4035 (weighted 27.2%) children in extended- versus nonextended-eligibility states/territories were more likely to be CIF (27.4% vs 20.5%, P < .001), 12 to 17 years old (37.2% vs 33.2%, P = .048), non-White (60.1% vs 45.9%, P < .001), and have a non-English primary language (20.6% vs 11.1%, P < .001).The relative risk of uninsurance for children in nonextended- versus extended-eligibility states/territories was 2.0 (95% confidence interval 1.4-3.0), after adjusting for covariates. Fewer children in extended- versus nonextended-eligibility states/territories were uninsured (adjusted prevalence 3.7% vs 7.5%, P < .001), had forgone medical (2.2% vs 3.1%, P = .07) or dental care (17.1% vs 20.5%, P = .02), and had no preventive visit (14.3% vs 17.0%, P = .04). More CIF than non-CIF were uninsured, regardless of residence in nonextended- versus extended-eligibility states/territories: CIF 11.2% vs 5.7%, P < .001; non-CIF 6.1% vs 3.1% P < .001. CONCLUSIONS Residence in nonextended-eligibility states/territories, compared with in extended-eligibility states/territories, was associated with higher uninsurance and less preventive health care utilization.