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PICOS (population, intervention/exposure, comparator, outcome, and setting) criteria used to perform the systematic review.
| PICOS | Criteria |
|---|---|
| Population | Healthy general population across all age groups |
| Intervention/exposure | Serum 25(OH)D |
| Comparator | Statistical tools (OR, HR, RR) |
| Outcome | Anthropometric/adiposity indices |
| Setting | Observational studies |
OR, odds ratios; HR, hazard ratios; RR, relative risk.
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