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Table 2 Quality assessment of the included studies: NOS tool

From: Role of proinflammatory mutations in peri-implantitis: systematic review and meta-analysis

Authors, year

Type of study

New Castle-Ottawa Scale (NOS)

Selection

Comparability

Exposure

Shimpuku et al. 2003

Case–control

Laine et al. 2006

Case–control

Cury et al. 2007

Case–control

Lachmann et al. 2007

Case–control

Lin et al. 2007

Case–control

Hamdy et al. 2007

Case–control

Gurol et al. 2011

Case–control

Melo et al. 2012

Case–control

Ladeira-Casado et al. 2013

Case–control

García-Delaney et al. 2015

Case–control

Rakic et al. 2015

Case–control

Petkovic-Curcin et al. 2017

Case–control