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Number times injured when activity at time of injury not ascertained, past 3 months

Codes and Frequencies

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For persons who had at least one injury/poisoning episode in the past 3 months, INJDONA reports the number of times a person's response is recorded as "not ascertained" when asked what she/he was doing at the time of injury. Persons who answered the question about what they were doing at the time of injury could list up to 2 activities. If a person refused, her/his response was not ascertained, or responded "don't know" when asked about what she/he was doing at the time of an injury, the person was recorded as having no second activity for THAT injury. The person may, however, have observations for activities she/he was performing at the time of OTHER injuries for which she/he did not have an unknown (refused, not ascertained, don't know) response.

INJDONA is a person-level variable and is derived from corresponding injury/poisoning episode-level data. This variable describes the activity at time of injury or poisoning.

INJDONA is part of a series of variables initiated in 1997 that systematically report persons' injuries and poisonings, the cause, what the person was doing while sustaining the injury or poisoning, and where she/he was at the time of the injury or poisoning. For related variables and additional information, please see the User note on Injuries and Poisonings or use the IPUMS NHIS search function and drop-down menus.


Prior to 2000, persons were asked about injuries and poisonings separately; in 2000, these categories were combined and persons were asked about the causes, activities, and locations related to injury and poisoning episodes at the same time.

blah blah blah.
for this variable in particular...fic to the variables before this, but then follow up with a general overviewIn 2000 a screening question regarding the number of injuries or poisonings that were serious enough to seek medical attention was reworded and caused a marked decrease in the number of persons reporting injuries. The question was changed back to the originally intended wording in subsequent years. Despite the significant decline in the overall number of injury and poisoning episodes reported in 2000, the percentage distributions of episodes for the person's activity at the time of injury/poisoning are comparable across time. For greater detail on these changes, please see the User Note on Injuries and Poisonings .


  • 2000-2017: Persons who had at least 1 injury episode during past 3 months.


  • 2000-2017