Mass shootings are associated with increased anxiety and depression nationwide, with an estimated ~2.27 million additional adults screening positive for anxiety and ~1.29 million additional adults for depression after a public mass shooting, with effects extending far beyond the immediate communities where shootings occur.
Key Findings
Results
Mass shootings are associated with increased rates of anxiety and depression nationwide after controlling for demographic and socioeconomic variables.
Study merged the Household Pulse Survey and the Northeastern University Mass Killing Database
Dataset covered 20 consecutive Household Pulse Survey waves from March 2022 to November 2023
Total sample size was approximately 1,094,000 adults
17 public mass shooting events occurred within the study window
Survey-weighted logistic regressions incorporating replicate and person-level weights were used to test whether odds of screening positive for anxiety and depression were higher in waves following a public mass shooting
Results
Translating effect sizes to population counts yields an estimated ~2.27 million additional adults screening positive for anxiety nationwide after a public mass shooting.
Effect size translation from survey-weighted logistic regression results was used to derive population-level estimates
The ~2.27 million figure represents additional adults screening positive for anxiety above baseline rates
This estimate applies to the nationwide population, not just those in the immediate community of a shooting
Results
An estimated ~1.29 million additional adults screen positive for depression nationwide after a public mass shooting.
This estimate is derived from the same survey-weighted logistic regression analyses
The depression effect is nationwide in scope, extending beyond the immediate shooting community
The depression impact estimate is smaller in magnitude than the anxiety estimate (~1.29 million vs. ~2.27 million)
Results
Higher death counts in mass shootings are associated with greater nationwide mental health effects.
Analyses examined characteristics of individual shooting events to identify predictors of effect magnitude
Death count was identified as a significant moderator of the nationwide mental health impact
This finding suggests that more lethal shootings have disproportionately larger public mental health consequences
Results
Shootings involving younger victims are associated with increased nationwide mental health effects.
Victim age was analyzed as a characteristic of shooting events alongside death count
Younger victim age was associated with greater nationwide increases in anxiety and depression
This finding is consistent with the heightened public response observed after school shootings such as Robb Elementary
Results
Analysis of the 2022 Robb Elementary School shooting found that anxiety and depression increased in the immediately following survey wave and that the size of the effect was inversely proportional to geographic distance from the shooting.
Data from survey waves immediately before and after the 2022 Robb Elementary School shooting in Uvalde, Texas were analyzed as a case study
Both anxiety and depression increased in the post-shooting wave compared to the pre-shooting wave
The effect was inversely proportional to geographic distance, meaning respondents closer to Uvalde experienced larger increases
Despite the distance gradient, mental health effects were still detectable at national scale, supporting the widespread impact thesis
Background
Half of the 20 deadliest U.S. mass shootings have occurred in the past decade, providing the epidemiological context motivating this study.
This statistic is cited to establish the increasing frequency and severity of mass shootings as a public health concern
The study window of March 2022 to November 2023 captured 17 public mass shooting events
The increasing rate of deadly mass shootings underscores the relevance of understanding their broad mental health consequences
What This Means
This research suggests that the mental health consequences of mass shootings extend far beyond the communities where they occur, affecting Americans across the entire country. The researchers linked a large national health survey (covering roughly 1.09 million adults over nearly two years) with a database of every public mass shooting during the same period. They found that in the weeks after a mass shooting, Americans nationwide were more likely to screen positive for anxiety and depression — not just people who lived near the shooting. They estimated that each mass shooting is associated with approximately 2.27 million additional adults experiencing anxiety symptoms and 1.29 million additional adults experiencing depression symptoms across the country.
The study also found that certain features of a shooting make its nationwide mental health impact larger: more deaths and younger victims both amplify the effect. A detailed look at the 2022 Robb Elementary School shooting in Uvalde, Texas confirmed that while people closer to the event were most affected, the mental health ripple extended outward across geographic distance, with measurable effects even far from the site.
This research suggests that public health responses to mass shootings should not focus solely on the immediate survivors and local community. Because tens of millions of Americans may experience psychological distress after these events — through news coverage, social media, and shared national trauma — mental health resources and policy responses may need to be scaled to address a much broader population than currently targeted.
Mishra A, Coleman M. (2026). Silent echoes: understanding and predicting the widespread mental health impact of mass shootings.. Frontiers in public health. https://doi.org/10.3389/fpubh.2026.1889624