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Table 2 Literature quality assessment according to NOS

From: Incidence and risk factors for cholelithiasis after bariatric surgery: a systematic review and meta-analysis

NO

Author

Year

Study type

Selection

Comparability

Exposure

Outcome

Total

1

Mohammed A. Aldriweesh

2020

cohort study

★★★★

★

\

★★★

8

2

Faisal A. Alsaif

2019

cohort study

★★★

★

\

★★★

7

3

Ainhoa Andre’s-Imaz

2020

case control study

★★★★

★

★★★

\

8

4

Muriel Coupaye, M.D.

2014

cohort study

★★★★

★

\

★★★

8

5

Hernán M. Guzmán

2019

cohort study

★★★

★

\

★★★

7

6

Sylke Haal

2022

cohort study

★★★★

★

\

★★★

8

7

Sylke Haal

2019

case control study

★★★★

★

★★★

\

8

8

Rosalie M. Kiewiet, MD

2006

cohort study

★★★

★

\

★★

6

9

Mehmet Celal Kızılkaya

2020

cohort study

★★★

★

\

★★

6

10

Vicky Ka Ming Li

2009

case control study

★★★

★

★★★

\

7

11

Wuttiporn Manatsathit, MD

2016

cohort study

★★★★

★

\

★★

7

12

Andreas Melmer

2015

cohort study

★★★

★

\

★★★

7

13

Rena C. Moon, M.D.

2013

case control study

★★★

★

★★★

\

7

14

Rachid Nagem

2012

cohort study

★★★

★

\

★★★

7

15

Sabri Özdaş

2019

cohort study

★★★

★

\

★★★

7

16

Sidney Pinheiro-Júnior

2012

case control study

★★★

★

★★★

\

7

17

M. Plecka Östlund

2012

cohort study

★★★★

★

\

★★★

8

18

Midhat Abu Sneineh

2020

cohort study

★★★★

★

\

★★

7

19

Victor B. Tsirline, M.D.

2014

cohort study

★★★

★

\

★★★

7