Related Experiment Video
Updated: Aug 8, 2025

Trajectory Data Analyses for Pedestrian Space-time Activity Study
Published on: February 25, 2013
Travel distance and time to dermatology clinical trial sites: a cross-sectional geospatial analysis
Eric J Beltrami1, Joseph Masison1, Hao Feng2
1University of Connecticut School of Medicine, Farmington, CT, USA.
Abstract:
Despite increasing calls for diversity in clinical trial recruitment, data are lacking regarding disparities in access to dermatologic clinical trials. The objective of this study was to characterize travel distance and time to reach a dermatology clinical trial site considering patient demographic and location characteristics. We determined travel distance and time from every census tract population center in the United States to the nearest dermatologic clinical trial site using ArcGIS and linked travel estimates to demographic characteristics in each census tract based on 2020 American Community Survey. Nationally, patients travel an average of 14.3 miles and 19.7 min to reach a dermatologic clinical trial site. Significantly shorter travel distance and time were observed for urban and Northeast residence, White and Asian race and private insurance relative to rural and Southern residence, Native American and Black race and public insurance (p < 0.001). These findings reveal disparate access regarding geographic region, rurality, race and insurance type, which may encourage investigators to allocate funding for travel assistance for underrepresented and disadvantaged groups to promote access and diversity in dermatologic clinical trials.
More Related Videos
Related Concept Videos
Design Example: Alignment of a Road Line Using GIS
Manipulation and Analysis
Clinical Trials
There are four phases in a clinical trial. A phase one...
Clinical Trials: Overview
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

