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PICOS criteria for inclusion and exclusion of studies
| PICOS criteria | Inclusion | Exclusion |
|---|---|---|
| Population | All population groups | Nonhuman studies |
| Intervention | Measure of diet quality | Articles not evaluating dietary quality (eg, assessing environmental impacts, food labeling, influence of advertisements, or food safety issues) |
| Comparator | No comparator, descriptive systematic review | |
| Outcome | New or updated diet quality index | Studies using an existing index |
| Setting | All settings |
