Did the Medicaid expansion improve immunization among U.S. pregnant women?

ABSTRACT:

Objectives

Affordable Care Act (ACA) Medicaid expansion increased financial eligibility of low-income individuals. Its effects are mixed on influenza vaccination and unknown for Tetanus, Diphtheria, and Acellular Pertussis (Tdap) vaccination among pregnant women in the United States. We aim to address mixed and missing evidence in literature.

Methods

We merged 44,320 pregnant women from 2011 to 15 Pregnancy Risk Assessment Monitoring System with National Welfare Data by residency. Treatment group included Medicaid enrollees in post-ACA expansion states. Control included non-Medicaid enrollees in expansion states and all individuals in non-expansion states. We employed triple-difference method to estimate Medicaid expansion treatment effects on individual vaccination probabil

SUBMITTER: Zhao J 

PROVIDER: S-EPMC12491732 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature