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Table 1 Critical Appraisal research articles using the Joanna Briggs Institute (JBI) checklists (High quality: 80-100%; Medium quality: 50-80%; Low quality: < 50%)

From: Health system impacts of SARS-CoV − 2 variants of concern: a rapid review

Author, year

Pre-print (PP)/ Peer Review (PR)

Source

Average score

Adjust for PP or LE

Total Score (%)

Overall Quality

Cohort Study Designa

Bager, 2021

PR

Lancet

9.5

N/A

9.5 (86)

High

Budhiraja, 2021

PP

MedRxiv

7.5

−2

5.5 (50)

Medium

Challen, 2021

PR

BMJ

10.5

N/A

10.5 (95)

High

Cusinato, 2021

PR

Infection

10.5

N/A

10.5 (95)

High

Dabrera, 2021

PP

SSRN

9.5

−2

7.5 (68)

Medium

Dennis, 2021

PR

Critical Care Medicine

9.5

N/A

9.5 (86)

High

Erman, 2021

PP

MedRxiv

9.5

−2

7.5 (68)

Medium

Fisman, 2021

PP

MedRxiv

9

−2

7 (64)

Medium

Frampton, 2021

PR

Lancet

10.5

N/A

10.5 (95)

High

Freitas B, 2021

PP

MedRxiv

8

−2

6 (55)

Medium

Grint, 2021

PR

Clinical Infectious Diseases

10.5

N/A

10.5 (95)

High

Haas, 2021

PR

Lancet

10

N/A

10 (91)

High

Havers, 2021

PP

MedRxiv

10.5

−2

8.5 (77)

Medium

Jassat, 2021

PR

Lancet Global Health

10.5

N/A

10.5 (95)

High

Khedar, 2021

PP

MedRxiv

9

−2

7 (64)

Medium

Martin-Blondel, 2021

PP

SSRN

8.5

−2

6.5 (59)

Medium

Maslo, 2021

PP

MedRxiv

9.5

−2

7.5 (68)

Medium

McAllister, 2021

PP

MedRxiv

9

-2

7 (64)

Medium

Nyberg, 2021

PR

BMJ Open

11

N/A

11 (100)

High

Ong, 2021

PR

Clinical Infectious Diseases

10

N/A

10 (91)

High

Pascall, 2021

PP

MedRxiv

10

-2

8 (73)

High

Patone, 2021

PR

Lancet

9.5

N/A

9.5 (86)

High

Peuch, 2021

PP

Research Square

10.5

-2

8.5 (77)

Medium

Stirrup, 2021

PR

BMJ Open Respiratory Research

11

N/A

11 (100)

High

Swann, 2021

PP

MedRxiv

10

-2

8 (73)

Medium

Twohig, 2021

PR

Lancet Infectious Diseases

9.5

N/A

9.5 (86)

High

Vassallo, 2021

PR

Journal of Clinical Medicine

8.5

N/A

8.5 (77)

Medium

Veneti A, 2021

PR

PLOS One

9.5

N/A

9.5 (86)

High

Veneti B, 2021

PP

MedRxiv

9

-2

7 (88)

High

Whittaker, 2021

PR

Journal of Infection

9

N/A

9 (82)

High

Zavaski, 2021

PP

Research Square

9.5

-2

7.5 (68)

Medium

Cross-sectional Study Designb

Adhikari, 2021

PR

American Journal of Obstetrics & Gynecology

4

N/A

4 (50)

Medium

Agrawal, 2021

PR

European Journal of Molecular & Clinical Medicine

5

N/A

5 (63)

Medium

AlQahtani, 2021

PP

Research Square

7

-2

5 (63)

Medium

Area, 2021

PR

International Journal of Environmental Research and Public Health

7

N/A

7 (88)

High

Cetin, 2021

PR

Acta Microbiologica et Immunologica Hungarica

5.5

N/A

5.5 (69)

Medium

Courjon, 2021

PR

Nature

6

N/A

6 (75)

Medium

de Andrade, 2021

PP

MedRxiv

3.5

-2

1.5 (19)

Low

de Oliveira, 2021

PP

MedRxiv

3

-2

1 (13)

Low

Freitas A, 2021

PP

SciELO pre-prints

5.5

-2

3.5 (44)

Low

Funk, 2021

PR

Eurosurveillance

7

N/A

7 (88)

High

Garvey, 2021

LE

Journal of Infection

7.5

−1

6.5 (81)

High

Graham, 2021

PR

Lancet

7

N/A

7 (88)

High

Jablonska, 2021

PP

MedRxiv

5.5

−2

3.5 (44)

Low

Loconsole, 2021

PR

Environmental Research and Public Health

5

N/A

5 (63)

Medium

Louis, 2021

LE

Anaesthesia Critical Care & Pain Medicine

5.5

−1

4.5 (56)

Medium

Martinez-Garcia, 2021

PR

Microorganisms

6

N/A

6 (75)

Medium

Moore, 2021

PP

MedRxiv

3

−2

1 (13)

Low

Nonaka, 2021

PR

International Journal of Infectious Diseases

6.5

N/A

6.5 (81)

High

Snell, 2021

PP

MedRxiv

6

−2

4 (50)

Medium

Takemoto, 2021

PP

MedRxiv

6

−2

4 (50)

Medium

Case Control Study Designc

Abu-Raddad, 2021

PR

Clinical Infectious Diseases

7.5

N/A

7.5 (75)

Medium

  1. LE: letter to editor; Scored out of 11a; Scored out of 8b; Scored out of 10c