Jake Luo1, Weiheng Chen1, Min Wu1, Chunhua Weng2. 1. Department of Health Informatics and Administration, University of Wisconsin Milwaukee, Milwaukee, WI,United States; Biomedical Data and Language Processing Center, University of Wisconsin Milwaukee, Milwaukee, WI, United States. 2. Department of Biomedical Informatics, Columbia University, New York City, NY, United States.
Abstract
BACKGROUND: Prior studies of clinical trial planning indicate that it is crucial to search and screen recruitment sites before starting to enroll participants. However, currently there is no systematic method developed to support clinical investigators to search candidate recruitment sites according to their interested clinical trial factors. OBJECTIVE: In this study, we aim at developing a new approach to integrating the location data of over one million heterogeneous recruitment sites that are stored in clinical trial documents. The integrated recruitment location data can be searched and visualized using a map-based information retrieval method. The method enables systematic search and analysis of recruitment sites across a large amount of clinical trials. METHODS: The location data of more than 1.4 million recruitment sites of over 183,000 clinical trials was normalized and integrated using a geocoding method. The integrated data can be used to support geographic information retrieval of recruitment sites. Additionally, the information of over 6000 clinical trial target disease conditions and close to 4000 interventions was also integrated into the system and linked to the recruitment locations. Such data integration enabled the construction of a novel map-based query system. The system will allow clinical investigators to search and visualize candidate recruitment sites for clinical trials based on target conditions and interventions. RESULTS: The evaluation results showed that the coverage of the geographic location mapping for the 1.4 million recruitment sites was 99.8%. The evaluation of 200 randomly retrieved recruitment sites showed that the correctness of geographic information mapping was 96.5%. The recruitment intensities of the top 30 countries were also retrieved and analyzed. The data analysis results indicated that the recruitment intensity varied significantly across different countries and geographic areas. CONCLUSION: This study contributed a new data processing framework to extract and integrate the location data of heterogeneous recruitment sites from clinical trial documents. The developed system can support effective retrieval and analysis of potential recruitment sites using target clinical trial factors.
BACKGROUND: Prior studies of clinical trial planning indicate that it is crucial to search and screen recruitment sites before starting to enroll participants. However, currently there is no systematic method developed to support clinical investigators to search candidate recruitment sites according to their interested clinical trial factors. OBJECTIVE: In this study, we aim at developing a new approach to integrating the location data of over one million heterogeneous recruitment sites that are stored in clinical trial documents. The integrated recruitment location data can be searched and visualized using a map-based information retrieval method. The method enables systematic search and analysis of recruitment sites across a large amount of clinical trials. METHODS: The location data of more than 1.4 million recruitment sites of over 183,000 clinical trials was normalized and integrated using a geocoding method. The integrated data can be used to support geographic information retrieval of recruitment sites. Additionally, the information of over 6000 clinical trial target disease conditions and close to 4000 interventions was also integrated into the system and linked to the recruitment locations. Such data integration enabled the construction of a novel map-based query system. The system will allow clinical investigators to search and visualize candidate recruitment sites for clinical trials based on target conditions and interventions. RESULTS: The evaluation results showed that the coverage of the geographic location mapping for the 1.4 million recruitment sites was 99.8%. The evaluation of 200 randomly retrieved recruitment sites showed that the correctness of geographic information mapping was 96.5%. The recruitment intensities of the top 30 countries were also retrieved and analyzed. The data analysis results indicated that the recruitment intensity varied significantly across different countries and geographic areas. CONCLUSION: This study contributed a new data processing framework to extract and integrate the location data of heterogeneous recruitment sites from clinical trial documents. The developed system can support effective retrieval and analysis of potential recruitment sites using target clinical trial factors.
Authors: G Dusheiko; H Schmilovitz-Weiss; D Brown; F McOmish; P L Yap; S Sherlock; N McIntyre; P Simmonds Journal: Hepatology Date: 1994-01 Impact factor: 17.425
Authors: Gabrielle A Carlson; Peter S Jensen; Robert L Findling; Roger E Meyer; Joseph Calabrese; Melissa P DelBello; Graham Emslie; Laurie Flynn; Frederick Goodwin; Martha Hellander; Robert Kowatch; Vivek Kusumakar; Thomas Laughren; Ellen Leibenluft; James McCracken; Editha Nottelmann; Daniel Pine; Gary Sachs; David Shaffer; Renee Simar; Michael Strober; Elizabeth B Weller; Janet Wozniak; Eric A Youngstrom Journal: J Child Adolesc Psychopharmacol Date: 2003 Impact factor: 2.576