Description: How many times have you had the trouble with your back - at age 31 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 | Once or twice |
| 2 | Several times |
| 3 | Frequently |
| Field ID | Description | Category |
|---|---|---|
| 7981 | How many times have you had the trouble with your back - at age 31 years | Musculoskeletal system conditions |
National Survey of Health and Development 1946 Cohort