Description: Are you willing to do visual letter search test (derived) - at age 60-64 years
This is a flat (unstructured) list which uses integers to represent categories or special values.
| Coding can be downloaded here as a tab-separated file. |
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| Coding | Meaning |
|---|---|
| 1 | Yes |
| 2 | No |
| 3 | Unable Medical or material reasons |
National Survey of Health and Development 1946 Cohort