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Table 3 Quality assessment of the cross-sectional studies using the non-randomized studies scale

From: Pro- and anti-inflammatory cytokines and osteoclastogenesis-related factors in peri-implant diseases: systematic review and meta-analysis

Author name

Year

Domain

1

2

3

4

5

6

Arikan

2008

High

Low

High

Unclear

High

High

Ata-Ali

2015

High

Low

High

Unclear

High

High

Chaparro

2020

High

Low

High

Unclear

High

High

Chaparro

2022

High

Low

High

Unclear

High

High

Duarte

2009

High

High

High

Unclear

High

High

Kandaswamy

2022

High

Low

High

High

High

High

Milinkovic

2021

High

Low

High

Unclear

High

High

Rakic

2013

High

High

High

Unclear

High

High

Rakic

2014

High

High

High

Unclear

High

High

Song

2022

High

Low

High

Unclear

High

High

  1. Domain 1: Selection bias caused by inadequate selection of participants; Domain 2: Selection bias caused by inadequate confirmation and consideration of confounding variables (smoke habits and systemic diseases); Domain 3: Performance bias caused by inadequate measurement of intervention (exposure); Domain 4: Detection bias caused by inadequate blinding of outcome assessment; Domain 5: Attrition bias caused by inadequate handling of incomplete outcome data; Domain 6: Reporting bias caused by selective outcome reporting