1. Introduction
We examined changes in self-reported mental health, physical health, and emotional support among low-income parents with children ages 0–2 years old from pre-pandemic to pandemic periods and compared changes in parental health among parents who did versus did not have access to a clinic-based community health worker intervention supporting parents at early childhood preventive care visits. We utilized longitudinal parent survey data from pre-COVID-19 and COVID-19 time periods from both the intervention and control arms of an existing cohort of parents enrolled in a 10-clinic cluster randomized controlled trial (RCT). At enrollment (pre-pandemic) and 12-month follow-up (pandemic), participants reported on mental health, physical health, and emotional support using PROMIS measures (n = 401). During the pre-pandemic portion, control and intervention group parents had similar mean T-scores for mental health, physical health, and emotional support. At follow-up, mean T-scores for mental health, physical health, and emotional support decreased across both control and intervention groups, but intervention group parents had smaller declines in mental health T-scores (COVID-19 has had a disproportionate impact on low-income racial and ethnic minoritized populations [A national cross-sectional study of parents demonstrated substantial negative impact of the pandemic on parent and child well-being [There is a critical need to understand how the pandemic affected families with young children; however, data are limited, as most studies have focused on families with school-aged children or employed cross-sectional designs [