Data Dictionaries and Metadata
Table 1
Table
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Table 1
Table
Table 1
| Data dictionary element | Description | Example |
|---|---|---|
| Variable name | Machine-readable field name | `weight_kg` |
| Variable label | Human-readable description | Weight at enrollment in kilograms |
| Form or instrument | CRF where the field appears | Enrollment form |
| Field type | Type of data entry field | Numeric text box |
| Units | Measurement unit | Kilograms |
| Validation rule | Permitted format or range | 1-200 |
| Choices or coding | Permitted categorical values | 1 = Male, 2 = Female |
| Branching logic | Conditions for display | Show pregnancy fields only if applicable |
| Required status | Whether completion is mandatory | Required at enrollment |
| Source document | Where value is verified | Clinic measurement sheet |
| Notes | Additional guidance | Use calibrated study scale |