Codes and Frequencies
An 'X' indicates the category is available for that sample
| Code | Label |
23
|
17
|
16
|
08
|
|---|---|---|---|---|---|
| 0 | NIU | X | X | X | X |
| 1 | No | X | X | X | X |
| 2 | Yes | X | X | X | X |
| 7 | Unknown-refused | X | · | · | · |
| 8 | Unknown-not ascertained | X | · | · | · |
| 9 | Unknown-don't know | X | X | X | X |
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Description
For sample children, VDIFREADYN indicates whether the individual wears glasses or contacts to "read books, write, play hand-held games, or do other things that require [child] to see well up close." Please see the Universe tab for changes in universe over time.
This variable is included in the Sample Child Vision Supplement, sponsored by the National Eye Institute.
Comparability
There are notable differences in universes which must be accounted for to properly compare this variable over samples. See the Universe tab for details.
In addition to changes in universe, the NHIS questionnaire was substantially redesigned in 2019 to introduce a different data collection structure and new content. For more information on changes in terminology, universes, and data collection methods beginning in 2019, please see the user note.
Universe
- 2008 2016 2017: Sample children age 6-17 who wear glasses or contact lenses.
- 2023: Sample children age 0-17.
Availability
- 2008, 2016-2017, 2023
Weights
- 2008, 2016-2017, 2023 : SAMPWEIGHT
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