Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 2 Criteria for ascertainment of evidence level for best-evidence synthesis, adapted from Lievense et al[15, 16]

From: The association between diet quality, dietary patterns and depression in adults: a systematic review

Level of evidence Criteria for inclusion in best evidence synthesis
Strong evidence Generally consistent findings in:
Multiple high-quality cohort studies
Moderate evidence Generally consistent findings in:
    One high-quality cohort study and >2 high quality case-control studies
Limited evidence Generally consistent findings in:
    Single cohort study
    One or two case-control studies or
    Multiple cross-sectional studies
Conflicting evidence Inconsistent findings in <75% of the trials
No evidence No studies could be found