Description: If you know a headache is coming, what warning signs do you notice - at age 31 years
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| Coding can be downloaded here as a tab-separated file. |
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| Coding | Meaning |
|---|---|
| 1 | Something written in |
| Field ID | Description | Category |
|---|---|---|
| 8255 | If you know a headache is coming, what warning signs do you notice - at age 31 years | Nervous system conditions |
National Survey of Health and Development 1946 Cohort