Description: Pittsburgh Sleep Quality Index (PSQI): needs medications to sleep - at age 68 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 |
|---|---|
| 0 | Better |
| 1 | One |
| 2 | Two |
| 3 | Worse |
| Field ID | Description | Category |
|---|---|---|
| 9848 | Pittsburgh Sleep Quality Index (PSQI): needs medications to sleep - at age 68 years | Sleep |
National Survey of Health and Development 1946 Cohort