Description: Do you usually bring up any phlegm during the day or at night in winter?
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 |
|---|---|
| 0 | No |
| 1 | Yes |
| Field ID | Description | Category |
|---|---|---|
| 8646 | Do you usually bring up any phlegm during the day or at night in winter? | Respiratory problems |
National Survey of Health and Development 1946 Cohort