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Table 2 Risk of bias of the included studies

From: Adherence to Mediterranean diet associated with health-related quality of life in children and adolescents: a systematic review

Author, publication year

Study design

Selection

Comparability

Outcome

Score

Interpretation

Representativeness of the sample

Sample size

Nonrespondents

Ascertainment of exposure

Based on design and analysis

Assessment of outcome

Statistical test

Costarelli et al., 2012 [14]

Cross-sectional

 

 + 

 

 +  + 

 + 

 + 

 

5

High risk of bias

Muros et al., 2016 [15]

Cross-sectional

 + 

 + 

 

 +  + 

 +  + 

 + 

 

7

Low risk of bias

Zervaki et al., 2017 [16]

Cross-sectional

   

 +  + 

 + 

 + 

 

4

High risk of bias

Evaristo et al., 2018 [17]

Cross-sectional

 + 

 + 

 + 

 +  + 

 +  + 

 + 

 + 

9

Low risk of bias

Esteban-Gonzalo et al., 2019* [18]

Cross-sectional

   

 +  + 

 + 

 + 

 + 

5

High risk of bias

Ferrer-Cascales et al., 2019 [19]

Cross-sectional

 + 

 + 

 + 

 +  + 

 +  + 

 + 

 

8

Low risk of bias

Delgado-Floody et al., 2020 [20]

Cross-sectional

 + 

  

 +  + 

 + 

 + 

 + 

6

High risk of bias

Rodriguez-Rosado et al., 2020 [21]

Cross-sectional

   

 +  + 

 + 

 + 

 

4

High risk of bias

Caamaño-Navarrete et al., 2021 [22]

Cross-sectional

 

 + 

 + 

 +  + 

 + 

 + 

 + 

7

Low risk of bias

Mitri et al., 2021 [23]

Cross-sectional

 + 

 + 

 

 +  + 

 + 

 + 

 

6

High risk of bias

Mozzillo et al., 2021 [24]

Cross-sectional

 + 

  

 +  + 

 + 

 + 

 + 

6

High risk of bias

  1. *Originally a longitudinal study, it was considered the baseline cross-sectional cohort