Codes and Frequencies
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Description
For sample children, EYEXAMEV indicates if the individual has ever had their vision tested by a doctor or other health professional. Please see the Universe tab for changes in universe over time.
For those who answered affirmatively, a follow-up question asked the number of months since their vision was last tested (EYEXAMOS).
Comparability
Please see the Universe tab for changes in universe over time; this may affect comparability.
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
- 2002: Sample children under the age of 6.
- 2008; 2016 2017: Sample children under 6 who are not blind.
- 2023: Sample children ages 0-17.
Availability
- 2002, 2008, 2016-2017, 2023
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Weights
- 2002, 2008, 2016-2017, 2023 : SAMPWEIGHT