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Table 3 GRADE quality rating for clinical studies

From: Systematic review on diabetes mellitus and dental implants: an update

Study (author/year)

(a) Risk of bias

(b) Indirectness

(c) Heterogenity

(d) Lack of precision

(e) Publication bias

GRADE quality rating

Eskow et al. (2017) [10]

Low

No

No

No data given

No

 + 

Ormianer et al. (2018) [11]

Moderate

No

No

No

No

 + 

Castellanos-Cosano et al. (2019) [12]

Low

No

No

No data given

No

 ++ 

Alrabiah et al. (2019) [13]

Low

No

No

No data given

No

 ++ 

Sghaireen et al. (2020) [14]

Low

No

No

No

No

 +++ 

Papantonopoulos et al. (2017) [15]

Low

No

No

No data given

No

 ++ 

Atarchi et al. (2020) [16]

Moderate

No

No

No

No

 + 

Alasqah et al. (2018) [17]

Low

No

No

No data given

No

 ++ 

Singh et al. (2020) [18]

High

No

No

No data given

No

 + 

Al Zahrani et al. (2019) [19]

Low

No

No

No data given

No

 ++ 

Erdogan et al. (2015) [20]

Low

No

No

No data given

No

 ++ 

Oztel et al. (2017) [21]

Moderate

No

Yes

No

Possible

 + 

Gomez-Moreno et al. (2015) [22]

Low

No

Nein

No data given

No

 ++ 

Dogan et al. (2015) [23]

Low

No

Nein

No data given

No

 ++ 

Okamoto et al. (2018) [24]

Low

No

No

No

No

 +++ 

Al Amri et al. (2015) [25]

Low

No

No

No

No

 +++ 

de Araujo Nobre et al. (2016)

Low

No

No

No

No

 + 

Al Amri et al. (2017) [26]

Low

No

No

No data given

No

 ++ 

Al Amri et al. (2017) [27]

Low

No

No

No data given

No

 ++ 

Soh et al. (2020) [28]

Moderate

No

No

No data given

No

 + 

Mohanty et al. (2018) [29]

High

No

No

No data given

No

 + 

Aguilar-Salvatierra et al. (2016) [30]

Low

No

No

No data given

No

 ++ 

Rekawek et al. (2021) [31]

Low

No

No

No

No

 +++ 

Jagadeesh et al. (2020) [32]

High

No

No

No data given

Possible

 + 

Kandasamy et al. (2018) [33]

Moderate

No

No

No data given

Possible

 + 

Pedro et al. (2017) [34]

Moderate

No

No

No data given

No

 + 

Yadav et al. (2018) [35]

Low

No

No

No data given

No

 ++++ 

Khan et al. (2016) [36]

High

No

No

No data given

No

 + 

French et al. (2021) [37]

Moderate

No

No

No

No

 + 

Alberti et al. (2020) [38]

Low

No

No

No

No

 +++ 

Krebs et al. (2019) [39]

Low

No

No

No

No

 + 

Dalago et al. (2017) [40]

low

no

no

No

No

 + 

De Araújo Nobre et al. (2017) [41]

Moderate

No

No

No

No

 + 

Mayta-Tovalino et al. (2019) [42]

Moderate

No

No

No

No

 + 

Kissa et al. (2020) [43]

Low

No

No

No

No

 + 

Krennmair et al. (2018) [44]

Low

No

No

No

No

 + 

Al-Sowygh et al. (2018) [45]

Low

No

No

No data given

No

 ++ 

Corbella et al. (2020) [46]

Low

No

No

No

No

 + 

Al Amri et al. (2017) [47]

Low

No

No

No data given

No

 ++ 

Weinstein et al. (2020) [48]

Low

No

No

No

No

 +