UMIN-CTR Clinical Trial

Basic information
Official scientific title of the study	Clinical trial registry use in anesthesiology systematic reviews: A systematic review
Title of the study (Brief title)	Registry use in systematic reviews
Region	North America

Condition
Condition	Publication Bias
Classification by specialty	Anesthesiology
Classification by malignancy	Others
Genomic information	NO

Objectives
Narrative objectives1	To examine the frequency of clinical trial registry use in systematic review searches from 5 anesthesiology journals based on 2014 Google Scholar metrics: anesthesiology subcategory from 2007-2015.
Basic objectives2	Others
Basic objectives -Others	To examine whether unpublished studies were located from these searches and/or included in the systematic review summaries or pooled effect estimates.
Trial characteristics_1
Trial characteristics_2
Developmental phase

Assessment
Primary outcomes	1. Frequency of clinical trials registry searches reported in anesthesiology systematic reviews from 5 journals between 2007-2015.
Key secondary outcomes	2. Frequency of systematic reviewers who located unpublished trials for possible inclusion in the review. 3. Frequency of systematic reviews that included unpublished trials in systematic review summaries or pooled effect estimates.

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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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 and/or meta-analysis published in the journals: Anesthesiology, Anesthesia & Analgesia, British Journal of Anaesthesia, Anaesthesia, or Regional Anesthesia & Pain Medicine between January 1, 2007-December 31, 2015.
Key exclusion criteria	All other study designs were excluded including clinical trials and observational studies. Systematic reviews or meta-analyses published outside of the time frame and in journals not listed were not included.
Target sample size	200

Research contact person
Name of lead principal investigator	Blake Alan Umberham
Organization	Oklahoma State University Center for Health Sciences
Division name	College of Osteopathic Medicine
Address	1111 W. 17th St.
TEL	918-582-1972
Email	blake.umberham@okstate.edu

Public contact
Name of contact person	Blake Alan Umberham
Organization	Oklahoma State University Center for Health Sciences
Division name	College of Osteopathic Medicine
Address	1111 W. 17th St.
TEL	918-582-1972
Homepage URL	http://www.healthsciences.okstate.edu
Email	blake.umberham@okstate.edu

Sponsor
Institute	Oklahoma State University Center for Health Sciences
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	n/a
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 04 Month 16 Day

Progress
Recruitment status	Completed
Date of protocol fixation	2015 Year 05 Month 01 Day
Anticipated trial start date	2015 Year 06 Month 01 Day
Last follow-up date
Date of closure to data entry
Date trial data considered complete	2015 Year 12 Month 01 Day
Date analysis concluded	2016 Year 03 Month 01 Day

Related information
URL releasing protocol
Publication of results	Unpublished
URL releasing results
Results
Other related information	systematic review

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=R000025294