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Exploring Space-Time Interactions in Fatal Opioid Overdoses.
Sergio J Rey1, Elijah Knaap1, Alejandra Cabral2
1Center for Open Geographical Science, San Diego State University, San Diego, California, USA.
Geographical Analysis
|January 15, 2026
View abstract on PubMed
Summary
Fatal opioid overdoses in Riverside County show significant spatial disparities, with rural and low-socioeconomic neighborhoods experiencing higher rates. Targeted public health interventions are crucial for addressing these complex trends.
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Area of Science:
- Public Health
- Epidemiology
- Spatial Analysis
Background:
- The opioid crisis remains a critical public health issue, necessitating detailed geographic and demographic analysis.
- Understanding the spatial distribution of fatal opioid overdoses is key to developing effective interventions.
Purpose of the Study:
- To investigate the spatial and temporal patterns of fatal opioid overdoses in Riverside County, California.
- To identify clusters and contextual factors associated with these overdoses.
- To inform targeted public health strategies.
Main Methods:
- Utilized advanced spatial-temporal analysis techniques.
- Employed global and local Knox tests to identify overdose clusters.
- Analyzed data from January 2020 to March 2023.
Main Results:
- Identified significant spatial disparities in fatal opioid overdoses.
- Higher overdose rates were observed in rural areas and neighborhoods with lower socioeconomic status.
- Neighborhoods with larger Hispanic populations showed a higher occurrence of fatal overdoses, despite lower individual risk.
Conclusions:
- Fatal opioid overdoses are not uniformly distributed, with specific geographic and socioeconomic factors playing a significant role.
- Complex interactions between individual risk and environmental factors influence overdose patterns.
- Evidence-based, contextually tailored public health interventions are essential to combat the opioid crisis effectively.