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Population, Intervention, Comparators, Outcomes, and Study Design (PICOS) criteria for this study
| Criteria | Description |
|---|---|
| Population | All women of childbearing age |
| Intervention | The VAS and NRS scales |
| Comparison | The higher VAS scale vs. the lower VAS scale |
| Outcome | Relationship between pain intensity and vitamin D |
| Study design | Cross sectional, case control, quasi experiment, RCT |
VAS, visual analogue scale; NRS, numeric rating scale; RCT, randomized clinical trial.
