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Table 2 Characteristics of included studies

From: Meta-research evaluating redundancy and use of systematic reviews when planning new studies in health research: a scoping review

Author and year

Country1

Health Field2

Data material

Measures

Antman 1992 [7]

USA

Circulation and breathing

Primary studies

Redundancy

Ban 2017 [8]

UK

Circulation and breathing

Primary studies and researchers

Use of the EBR approach (JUST, SIM)a

Baum 1981

USA

Abdomen and endocrine

Primary studies

Redundancy

Bauman 2017

Australia

Public health and health systems

Primary studies

Redundancy

Bhurke 2015

UK

No specific medical specialty

Proposal funding

Use of the EBR approach (JUST, DESIGN)a

Blanco-Silvente 2019

Spain

Mental health and neuroscience

Primary studies

Redundancy

Bolland 2018

New Zealand

Musculoskeletal, oral, skin, and sensory

Primary studies

Redundancy

Bolland 2018 (part 2)

New Zealand

Musculoskeletal, oral, skin, and sensory

Primary studies

Use of the EBR approach (JUST, DESIGN)a

Brockington 2017

UK

Mental health and neuroscience

Primary studies

Use of the EBR approach (JUST, SIM)a

Chalmers 1996

USA

Children and families

Primary studies

Redundancy

Chapman 2019

UK

No specific medical specialty

Primary studies

Use of the EBR approach (DESIGN)a

Chiu 2021

USA

Cancer

Primary studies

Redundancy

Chow 2017

Canada

No specific medical specialty

Primary studies

Use of the EBR approach (JUST)a

Chow 2019

Canada

Cancer

Primary studies

Redundancy

Chow 2020

Canada

Cancer

Primary studies

Redundancy

Clarke M 2002

UK

No specific medical specialty

Primary studies

Use of the EBR approach (CONTXT)a

Clarke M 2014

UK

No specific medical specialty

Systematic reviews

Redundancy

Clarke M 1998 [3]

UK

No specific medical specialty

Primary studies

Use of the EBR approach (CONTXT)a

Clarke M 2007

UK

No specific medical specialty

Primary studies

Use of the EBR approach (JUST, DESIGN, CONTXT)a

Clarke M 2010

UK

No specific medical specialty

Primary studies

Use of the EBR approach (DESIGN, CONTXT)a

Clarke M 2013

UK

No specific medical specialty

Primary studies

Use of the EBR approach (JUST, DESIGN, CONTXT)a

Clayton 2017

UK

No specific medical specialty

Researchers (Conference delegates)

Use of the EBR approach (JUST, DESIGN, CONTXT)a

Conde-Taboada 2014 [10]

Spain

Musculoskeletal, oral, skin, and sensory

Primary studies

Use of the EBR approach (JUST)a

Coomarasamy 2006

UK

Children and families

Primary studies

Redundancy

Cooper 2005

UK

No specific medical specialty

Researchers

Use of the EBR approach (DESIGN)a

De Meulemeester 2018

Canada

No specific medical specialty

Primary studies

Use of the EBR approach (JUST)a

Engelking 2018

Croatia

Acute and emergency care

Primary studies

Use of the EBR approach (JUST)a

Fergusson 2005

Canada

Circulation and breathing

Primary studies

Redundancy

Use of the EBR approach (JUST, SIM)a

Fergusson 2018 [18]

Canada

No specific medical specialty

Primary studies

Use of the EBR approach (END-USER)a

Goudie 2010

UK

No specific medical specialty

Primary studies

Use of the EBR approach (JUST, DESIGN, CONTXT)a

Habre 2014 [19]

Switzerland

Musculoskeletal, oral, skin, and sensory

Primary studies

Redundancy (due to design error)

Use of the EBR approach (DESIGN)a

Helfer 2015

Germany

No specific medical specialty

Systematic reviews

Use of the EBR approach (JUST, SIM, CONTXT)a

Henderson 1995

USA

Circulation and breathing

Primary studies

Redundancy

Hoderlein 2017 [20]

Germany

Various sciences including healthcare

Primary studies

Use of the EBR approach (JUST, CONTXT)a

Ivers 2014

Canada

Public health and health systems

Primary studies

Redundancy

Jia 2021 [21]

USA

Circulation and breathing

Primary studies

Redundancy

Johnson 2020

USA

Acute and emergency care

Primary studies

Use of the EBR approach (JUST)a

Jones 2013

UK

No specific medical specialty

Proposal funding

Use of the EBR approach (JUST, DESIGN)a

Joseph 2018.

Australia

No specific medical specialty

Protocol RECs

Use of the EBR approach (JUST)a

Jüni 2004

Switzerland

Circulation and breathing

Primary studies

Redundancy

Ker 2012

UK

Circulation and breathing

Primary studies

Redundancy

Ker 2015 [22]

UK

Musculoskeletal, oral, skin, and sensory

Primary studies

Redundancy

Use of the EBR approach (JUST)a

Lau 1992 [6]

USA

Circulation and breathing

Primary studies

Redundancy

Love 2018

UK

Public health and health systems

Primary studies

Redundancy

Murad 2017

Switzerland

No specific medical specialty

Primary studies

Redundancy

Paludan-Muller 2019

Denmark

No specific medical specialty

Protocol RECs

Use of the EBR approach (JUST, DESIGN)a

Pandis 2016 [12]

Switzerland

No specific medical specialty

Published protocols

Use of the EBR approach (JUST, DESIGN)a

Park 2017

Korea

Cancer

Systematic reviews

Redundancy (overlapping meta-analyses)

Use of the EBR approach (JUST, SIM)a

Poolman 2007

The Netherlands

Acute and emergency care

Primary studies

Redundancy

Rauh 2020

USA

Children and families

Primary studies

Use of the EBR approach (JUST)a

Riaz 2016

USA

No specific medical specialty

Systematic reviews

Redundancy (overlapping meta-analyses)

Robinson 2014

USA

No specific medical specialty

Primary studies

Use of the EBR approach (JUST, SIM)a

Robinson 2011 [14]

USA

No specific medical specialty

Primary studies

Use of the EBR approach (JUST, SIM)a

Rosenthal 2017

Switzerland

No specific medical specialty

Primary studies

Use of the EBR approach (JUST, DESIGN, CONTXT)

Ross 2009

USA

Circulation and breathing

Primary studies

Redundancy

Sawin 2016

USA

Circulation and breathing

Primary studies

Use of the EBR approach (JUST, SIM)a

Seehra 2021

UK

Musculoskeletal, oral, skin, and sensory

Primary studies

Use of the EBR approach (JUST)a

Shepard 2021

USA

Abdomen and endocrine

Primary studies

Use of the EBR approach (JUST)a

Sheth 2011

Canada

Acute and emergency care

Primary studies

Use of the EBR approach (JUST, SIM)a

Sigurdson 2020

USA

Public health and health systems

Systematic reviews

Redundancy (overlapping meta-analyses)

Use of the EBR approach (JUST, SIM)a

Sinclair 1995

Canada

Children and families

Primary studies

Redundancy

Siontis 2013

USA

No specific medical specialty

Systematic reviews

Redundancy (overlapping meta-analyses)

Use of the EBR approach (JUST)a

Smith 1997

UK

Circulation and breathing

Primary studies

Use of the EBR approach (DESIGN)a

Storz-Pfennig 2017

Germany

No specific medical specialty

Systematic reviews

Redundancy

Torgerson 2020

USA

Musculoskeletal, oral, skin, and sensory

Primary studies

Use of the EBR approach (JUST)a

Vergara-Merino 2021

Chile

No specific medical specialty

Primary studies

Redundancy

Verhagen 2019

The Netherlands

Musculoskeletal, oral, skin, and sensory

Primary studies

Redundancy

Walters 2020

USA

No specific medical specialty

Primary studies

Use of the EBR approach (JUST)a

Whiting 1995

USA

Cancer

Primary studies

Redundancy

  1. All references are listed in Additional file 1, additional material 11
  2. aQuestionable research practices evaluated:
  3. JUST, authors do not use the results of a systematic and transparent collection of earlier similar studies when justifying a new study; SIM, authors of a scientific study do not refer to all earlier similar studies; DESIGN, authors do not use the results of a systematic and transparent collection of earlier similar studies when designing a new study; END-USER, authors do not use the results of a systematic and transparent collection of the new research projects’ end user’s perspectives to inform the justification and design of the new study; CONTXT, authors do not systematically and transparently place new results in the context of existing evidence