Description: Reason why blood sample was refused: Previous difficulties with venepuncture - at age 77 years
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| Coding | Meaning |
|---|---|
| 0 | Not mentioned |
| 1 | Mentioned |
| Field ID | Description | Category |
|---|---|---|
| 10643 | Reason why blood sample was refused: Previous difficulties with venepuncture - at age 77 years | Blood sample |
National Survey of Health and Development 1946 Cohort