Spatial accessibility to drug treatment facilities and EMS services in New Hampshire

Authors: Yanjia Cao*, University of Maryland, Kathleen Stewart, University of Maryland
Topics: Medical and Health Geography, Geographic Information Science and Systems
Keywords: Spatial accessibility, drug treatment, EMS service
Session Type: Paper
Day: 4/10/2018
Start / End Time: 4:40 PM / 6:20 PM
Room: Grand Ballroom C, Astor, 2nd Floor
Presentation File: No File Uploaded


The state of New Hampshire is considered an NDEWS (National Drug Early Warning System) hot-spot area due to its very high rate of fentanyl use and fentanyl-related deaths as reported by the National Institution of Drug Abuse. According to NDEWS report, in 2015, the number of fentanyl-related deaths reached 283, almost the twice the number of deaths reported in 2014. This research investigates spatial variation of accessibility of two key sources where heroin and fentanyl users can receive treatment in New Hampshire. To do this, we examine spatial accessibility based on illicit drug use per township as reported by NSDUH to drug treatment facilities and accessibility from locations of known decedent fatal drug use to emergency medical services (EMS) in New Hampshire. To explore spatial accessibility to both drug treatment centers and EMS services, we apply the enhanced two-step floating catchment area integrated with a huff model to account for factors including the availability of drug treatment (i.e., service settings(e.g., inpatient treatment)), the capacity (i.e., drug treatment services (e.g., buprenorphine maintenance)) of each drug treatment center, and availability of ambulances. An overlay and composite index will reveal the degree to which, for example, locations with high access to drug treatment also have high access to EMS services and how the relationships and patterns vary spatially.

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