Description: Have you ever injured your knees badly enough to see a doctor about it? - first record - at age 53 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 | Right knee |
| 2 | Left knee |
| 3 | Never had a knee injury |
| Field ID | Description | Category |
|---|---|---|
| 30023 | Have you ever injured your knees badly enough to see a doctor about it? - first record - at age 53 years | Aches and pains |
National Survey of Health and Development 1946 Cohort