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Child's hearing problem began before or after third birthday

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For sample children under age 18 with hearing problems whose parents either didn't know or refused to answer the age at which the child began to have hearing problems, HEARDCAGE3 indicates whether the hearing problems began before or after the child's third birthday.

This variable is part of the Sample Child Prevention Module, which provides information on specific health conditions, dental health and oral hygiene, and injury prevention. For related variables and more information about this supplement, please use the IPUMS NHIS search function and drop-down menus.


There are no comparability issues.


  • 1998: Sample children who had hearing problems and whose age at the beginning of hearing problems was unknown.


  • 1998