Neighborhood Environmental Interventions and Opioid Overdose Rates

Previous research has shown neighborhood environmental interventions can improve health and safety for residents. It is unknown whether these interventions impact opioid overdose outcomes.

To evaluate the association of neighborhood environmental interventions with opioid overdose rates.

This quasi-experimental nonrandomized trial used a continuous treatment difference-in-differences design and was conducted in a single neighborhood of Philadelphia, Pennsylvania, between January 1, 2019, and December 31, 2021. The quasi-experimental design used nonrandomized comparator groups to evaluate the associations of neighborhood environmental interventions with opioid overdose rates since randomization was not possible. Data analysis took place between May 2022 and February 2025.

Community trash pickups, vacant lot cleanups, and abandoned house remediation.

Outcomes of interest were nonfatal and fatal opioid overdoses.

Of 1667 individual blocks (median household income, $37 821) included in the study geography, 622 blocks (37.3%) received at least 1 intervention during the study period. Among 59 590 residents in the study area, there were 1179 Asian residents (2.0%), 9951 Black residents (16.7%), 23 261 White residents (39.0%), 5016 residents (8.4%) who identified as 2 or more races, and 19 903 residents (33.4%) who identified as another race; 30 286 residents (50.8%) were Hispanic or Latinx. A total of 763 community trash pickups, 483 abandoned house remediations, and 855 vacant lot cleanups were included in analysis. In aggregate, the interventions were associated with a significant reduction in fatal opioid overdoses (change, -6.6%; 95% CI, -10.5% to -2.4%), with no measurable association for nonfatal opioid overdoses (change, -0.0%; 95% CI, -3.4% to 3.5%). Abandoned house remediation was associated with a significant reduction in both fatal (change, -17.6%; 95% CI, -26.2% to -7.9%) and nonfatal (change, -11.5%; 95% CI, -19.0% to -3.3%) opioid overdoses. Community trash pickup was not associated with rates of fatal or nonfatal overdoses. Vacant lot cleanup was not associated with rates of fatal overdoses but was associated with a significant increase in nonfatal overdoses (change, 11.7%; 95% CI, 4.0% to 20.0%). No significant displacement associations were found in other locations.

In this study of the association of neighborhood environmental interventions with opioid overdose rates, interventions analyzed in aggregate were associated with reduced fatal opioid overdoses outcomes, with no association with nonfatal outcomes. Abandoned house remediation was significantly associated with reduced fatal and nonfatal opioid overdose rates and should be considered along with other essential interventions that provide treatment and harm reduction to individuals with substance use disorder.