UMIN-CTR Clinical Trial

Basic information
Official scientific title of the study	Utilization of Clinical Trials Registries in Systematic Reviews: A State of Emergency in Emergency Medicine?
Title of the study (Brief title)	Clinical trials registry search in the top 20 emergency medicine journals
Region	North America

Condition
Condition	Emergency medical interventions
Classification by specialty	Emergency medicine
Classification by malignancy	Others
Genomic information	NO

Objectives
Narrative objectives1	This study assesses the frequency of clinical trials registry utilization in systematic reviews and meta-analysis published in the top 20 emergency medicine journals between 2007 and 2016. Searching clinical trials registries for unpublished data is encouraged and is likely to dramatically improve the validity of conclusions reached about effect sizes calculated by systematic reviews and meta-analyses. Recent studies have shown that omission of clinical trials registry data is prevalent across different specialties. This is the most comprehensive study to date to address this question in the emergency medicine specialty, assessing the issue over the past 8 years in the top specialty journals.
Basic objectives2	Others
Basic objectives -Others	Increase awareness of clinical trials registry use in emergency medicine systematic reviews and meta-analyses
Trial characteristics_1
Trial characteristics_2
Developmental phase

Assessment
Primary outcomes	1. Frequency of clinical trials registry search by journal 2. Temporal trend of clinical trials registry use
Key secondary outcomes	1. Use of clinical trials registries data in each publication

In outcomes field, the entry of just a few words such as "safety" or "efficiency" will not be accepted. Specify the name of outcome measures, including the time when you plan to measure. Usually, only one primary outcome is accepted. Write the other outcomes in "secondary outcomes" field.

Base
Study type	Others,meta-analysis etc

Study design
Basic design
Randomization
Randomization unit
Blinding
Control
Stratification
Dynamic allocation
Institution consideration
Blocking
Concealment

Intervention
No. of arms
Purpose of intervention
Type of intervention
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Interventions/Control_2
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Interventions/Control_10

In interventions field, include the details of interventions, such as duration, amount, and frequency. If the intervention includes prescription or use of medical devices, duration is required.

Eligibility
Age-lower limit	Not applicable
Age-upper limit	Not applicable
Gender	Male and Female
Key inclusion criteria	Study must be a systematic review or a meta-analysis published between January 1st, 2007 and April 31st, 2016. Additionally, the study must have been published in any of the top 20 journals within the emergency medicine specialty, as rated by the h-5 index
Key exclusion criteria	Any publication that is not a systematic review or meta-analysis (e.g. editorials, letters, primary studies, etc.)
Target sample size	300

Research contact person
Name of lead principal investigator	Vadim Yerokhin
Organization	Oklahoma State University, Center for Health Sciences
Division name	Advanced Analytics: Branch of Vassar Research Team
Address	1111 W 17th st Tulsa, OK, USA 74137
TEL	9185821972
Email	vadim.yerokhin@okstate.edu

Public contact
Name of contact person	Vadim Yerokhin
Organization	Oklahoma State University Center for Health Sciences
Division name	Advanced Analytics: Branch of Vassar Research Team
Address	1111 W 17th st Tulsa, OK, USA 74137
TEL	9185821972
Homepage URL
Email	vadim.yerokhin@okstate.edu

Sponsor
Institute	Oklahoma State University
Institute
Department

Sponsor means an organization that is responsible for plan, deployment and report of the research including funding management. It doesn't mean funding agency". Therefore, all clinical trial should have the one.

Funding Source
Organization	Not applicable
Organization
Division
Category of Funding Organization	Self funding
Nationality of Funding Organization

Other related organizations
Co-sponsor
Name of secondary funｄer(s)

Secondary IDs
Secondary IDs	NO
Study ID_1
Org. issuing International ID_1
Study ID_2
Org. issuing International ID_2
IND to MHLW

Institutions
Institutions

Other administrative information
Date of disclosure of the study information	2016 Year 05 Month 15 Day

Progress
Recruitment status	Completed
Date of protocol fixation	2015 Year 10 Month 15 Day
Anticipated trial start date	2015 Year 12 Month 10 Day
Last follow-up date
Date of closure to data entry
Date trial data considered complete
Date analysis concluded

Related information
URL releasing protocol
Publication of results	Unpublished
URL releasing results
Results
Other related information	This is a systematic review of literature published between 2007 and 2016 in the top 20 emergency medicine journals.

Management information
Registered date	2016 Year 04 Month 16 Day
Last modified on	2016 Year 04 Month 16 Day

Link to view the page
URL(English)	https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000025295